2
  -2022
  
 
( -1)
 :    :100
:    ,  A, B, C  D          
           
-
1. (i)     = 25 - 2p = - 2 + p  , 75  
             
(ii)  :

(iii)   4x 4 - 4x3 - 7x2 - 4x + 4 = 0
2.(i)  AP  n     ,  p  (3p)/4 + 1 
(ii)       16 ,    8 , 
   ?
(iii)  a, b, c, d    ,     a - bb - cc - d   
-
3. (i)   700  ,  200     1,900  , x
     y  ,      x   

2
(ii)       
(iii)   
(2, 0), (4, -2)  (5, -3)         
  
4. (i)            
(ii)   ,          
(iii)  A  B     A  25  , B  20    AB  35  
AOB      
-
5. (i)            
(ii)        
6.     log x  ex    
-
7. (i) log wrtx   󰇣


󰇤
(ii) log(log)   

󰇜
(iii) x, ax + xx + ex     
8. (i)      ,  p = 3        


(ii)     y = 20 + 20x + 0.5x 2,  y    x  , AC
 MC  
2
  -2022
  
 
( -1)
 :    :100
:    ,  A, B, C  D          
           
-
1. (i)     = 25 - 2p = - 2 + p  , 75  
             
(ii)  :

(iii)   4x 4 - 4x3 - 7x2 - 4x + 4 = 0
::󹴡󹴵󹴣󹴤 1 (i):        
  
      ...
󹴮󹴯󹴰󹴱󹴲󹴳   :    
                   
                 () 
       ()
󼩕󼩖󼩗󼩘󼩙󼩚 :
 :
qd=25−2p(    -   ,      )
 :
qs=−2+p (    -   ,      )
2
 (  = )   ,  qd=qsq_d = q_sqd=qs    
 ,                
󷃆󼽢 1:     
qd=qsq_  
25−2=−2+
 p ()   :
   2p2p2p :
25=−2+3
   2 :
27=3
   3   :
=9
 p = 9     q ()         
qd=25−2p   
=25−2(9)=25−18=7
󹻀  :
( ): ₹9
 (q): 7 
󷃆󼽢 2:   ₹75     
     ,              
      ,           , ,
   p   (p - 75) 
,       :
:
=−2+
2
  :
=−2+(−75)=−2+−75=−77+
       :
25−2=−77+
   2p :
25=−77+3
  77 :
102=3
3   :
=34
      :
=25−2(34)=25−68=−43
!󽅂    .
     ,       ,   
 ( - 75)   -         :
     :
  :
=−2+(−75)=−2+75=77
  :
25−2=77
2p :
25=377
77 :
102=3=34
   :
=25−2(34)=25−68=−43
2
 ,  !        ,      - 
                
   -       
󼨐󼨑󼨒  :
       = 
          ( )    
                
󹴡󹴵󹴣󹴤 1(ii):  :
  --  ,     
󷃆󼽢 1:   
      ,      -  :
  : x≥5
󷃆󼽢 2:    
  :
    :
    .
         :
 x = 5   :
2
  x = 1  :
   x = 6  :
  .
x = 0.5  :
   .
x = 5.2  :
    x = 0.01  :
  .
          :
  :
     :
 x  :
     :
     :
2
:   .
    ?    :
    :
x = 0.086 (       )   ,    :
   0.086 ,     (x ≥ 5)   ,    
   
󹴡󹴵󹴣󹴤 1(iii):  :
           
󷃆󼽢 1:      
  (±1, ±2, ±4)   (±1, ±2, ±4)      
x = 1  :
4(1)4 4(1)3 7(1)2 4(1) + 4 = 4 4 -7 4 = 4 =-7 0  = 2 :4(16) 4(8) 7(4) 4(2) +4 =
   = - 1: \[4(-1)4 4(-1)3 - 7 (-1)2 -4(-1) + 4 = 4 + 4 = 7 + 4 + 4 = 9 
= - 2 :\[4(16) = 4(=8) = 7(4) 4(-2) + 4 =




...

,



:


          
x = 1  :
4 4 7 4 + 4 = -7 x = 2 : \[64 32 28 8 + 4 +

0

,



:







:\[4x4 4x3 7x2 - 4x + 4 = (x2 x - 1) (4x2 + 4x - 4)
     :
󼨐󼨑󼨒 :
2
    ,   
󷃆󼽢 ()
        :
1.            -   
   
2.               
-         
3.             
   ,         
               
 !
2.(i)  AP  n     ,  p  (3p)/4 + 1 
(ii)       16 ,    8 , 
   ?
(iii)  a, b, c, d    ,     a - bb - cc - d   
: 󹴡󹴵󹴣󹴤 :   
               
            ,     
      :
1.   ()-            

2.   ()-            
 
                  ,
  ,   ,            
        
2
󼩕󼩖󼩗󼩘󼩙󼩚  (i):     n   ,   p- 
  :
     AP  p-       :
   AP   n         
󹸯󹸭󹸮  1:      
 AP  p-  :
          = 1,  = 2,,   ,
 ,  
    :

   :
   :
,    d  
  AP :
  :
󽄡󽄢󽄣󽄤󽄥󽄦  2: AP     
2
 AP   n         :
:
a =   =
d =   =
   :
:
   :
󹴡󹴴󹴣󹴤  (ii):      
  :
      16    8 ,    ?
󹸯󹸭󹸮  1:    
   ,   a  b    (GM) :
   :
2
 = 16
  (  a) = 8
    (  b)
󽄡󽄢󽄣󽄤󽄥󽄦  2:    
󷃆󼽢 :   32
   8  32 ,     16 
  :
󹴡󹴶󹴣󹴤  (iii):  a, b, c, d    ,     a - b, b - c, c - d
   
  :
 :
a,b,c,d   
     :
, , 
   
󹸯󹸭󹸮  1: GP  a  r     
     a     r   GP  :

2
3
  :
2
    :
  GP        r    
  :
󷃆󼽢    GP  
󷇴󷇵󷇶󷇷󷇸󷇹    


 
 
()
p-   AP

A  d      Tp=a+(p−1)d   ,
     

󰇛
 
󰇜
(ii)


ab=   


32
(iii)
 
GP  a−b, b−c, c−d  
󷃆󼽢 
󷕘󷕙󷕚     :    
        :
1.  :         
2.   : ,  (  )    (
 )        
3.            
2
   :
      ₹100         
 
          -  
 (iii)            
󽄻󽄼󽄽  
       ;           
         ,       
      ,           
   -   
     ,          -  
         !
-
3. (i)   700  ,  200     1,900  , x
     y  ,      x   

(ii)       
(iii)   
(2, 0), (4, -2)  (5, -3)         
  
:          
                
             ,    
   :
1.   
2.   
3.          
     -   -     ,   
 
2
 (i):   y = f(x)  
 :
  = ₹700
200      = ₹1900
       x        
  x       y   
󹰤󹰥󹰦󹰧󹰨      ?
            1    100,
    -      ,      
   
               -  , 
, ,           ₹5  
 ,  100    ₹500   
 ,          ,      
󷃆󼽢  1:   
      :
 =  + 
:
y, x      
m     () 
c   () 
󷃆󼽢  2:    
   :
  c = 700
x = 200  ,  y = 1900
2
    :
1900 =  * 200 + 700
   700  :
1200 = 200
 m   :
 = 1200 / 200 = 6
     ₹6
󷃆󼽢  3:   
 m = 6  c = 700      :
󷃆󼽢 y = 6x + 700
     ,   x    ,  
 ₹(6x + 700) 
󹳴󹳵󹳶󹳷  
    500    x = 500  :
y = 6(500) + 700 = 3000 + 700 = ₹3700
, 500         ₹3700 
 (ii):   
     5 -   : , , , 
 
:
      (  )
       3  (    )
        
2
󷃆󽄿   ?
        ,       ,  
 
:   3      5  ,   
 ,   
󷃆󹹳󹹴󹹵󹹶  
   n  ,     r     ,   :
(, ) = ! / ( - )!
 n! (n )    n × (n1) × (n2)... × 1
:
5   3          ?
P(5, 3) = 5! / (5 - 3)! = 5 × 4 × 3 = 60 
󷃆󽄿   ?
       ,      
:
 5     3            --
  --  
󷃆󹹳󹹴󹹵󹹶  
(, ) = ! / [!( - )!]
:
5   3      ?
C(5, 3) = 5! / [3! × (5 - 3)!] = 5 × 4 × 3 / (3 × 2 × 1) = 10 
󼨐󼨑󼨒 - 
               
(     )            
     (      ,    )
2
 (iii):  
      ?
                  
    :
(2, 0)
(4, -2)
(5, 3)
           ,   ,      

󷃆󼽢  1: A  B      
  (x₁, y₁)  (x₂, y₂)    :
 = (y₂ – y₁) / (x₂ – x₁)
AB  :
 = (2 0) / (4 2) = 2 / 2 = 1
󷃆󼽢  2: B  C      
 = (3 (2)) / (5 4) = (1) / 1 = 1
 AB   = BC   = -1,       
󷃆󼽢  3:     
  :
 m = 1
   : A(2, 0)

-    :
y y₁ = m(x – x₁)
:
y 0 = 1(x 2)=> y = x + 2
2
󷃆󼽢  :
,           : y = x + 2
󼩎󼩏󼩐󼩑󼩒󼩓󼩔   
                  
   ,              

󼪺󼪻 :     
1.  
  = ₹700
200    = ₹1900
: y = 6x + 700
2.   

FORMULA
  
?

(, ) = ! / ( )!

(, ) = ! / [!(
)!]

3. 3 
  
: (2,0), (4,2), (5,3)
   
: y = x + 2
󽄡󽄢󽄣󽄤󽄥󽄦     
     -          , 
                , 
          ,    ,    
         
2
              ,  
        
4. (i)            
(ii)   ,          
(iii)  A  B     A  25  , B  20    AB  35  
AOB      
: :          
              , "  
       "          , "
         "        
 , "       ?"
                
               ,   
               

                ,  , 
    ,           

(i)       
  ?
 ,  -       ,     
  
                  
   
         
         
:
     : {a, e, i, o, u}
2
10      : {2, 4, 6, 8}
    : {, , , , , , }
       (, , , )       
     
  :
            
1.  ( ):
     ,     
: φ  {}
:  A =     200       , A
= {}       
2.  :
       
:
B =      = {, , ..., }
3.  :
       (    )
:
C =       = {1, 2, 3, 4, ...}
4.  :
                 
 
:
A = {1, 2, 3}, B = {3, 2, 1}, A = B
2
5.  :
       ,      
:
X = {a, b, c}, Y = {1, 2, 3}  3   
6. :
 A, B     A    B   
: A B
:
 A = {1, 2}, B = {1, 2, 3},  A B
7.  :
          , A  B    
A, B   ,  A ≠ B
8.  :
            
  
:
  1  10         ,  U = {1, 2, 3, ..., 10}
9.  :
               
:
 A = {1, 2},  P(A) = { {}, {1}, {2}, {1, 2} }
10.  :
           
2
:
= {1, 2},  = {3, 4}  = φ
(ii)  : ,   
       ,         , 
    
1.    (A B):
 A  B              A  B   

:
= {1, 2, 3},  = {3, 4, 5}  = {1, 2, 3, 4, 5}
:
:  = 
:( )  = ( )
: =
: φ =
2.    (A ∩ B):
A  B               A  B   
:
A = {1, 2, 3}, B = {3, 4, 5}A ∩ B = {3}
:
:  = 
:( ) ∩  = ∩ ( )
: =
: φ = φ
3.    (A):
2
  A      U         A   
:
 U = {1, 2, 3, 4, 5},  A = {1, 2, 3},  A = {4, 5}
:
= 
= φ
() =
(iii)       
 :
 A     = n(A) = 25
 B     = n(B) = 20
A ∩ B     = n(A ∩ B) = 35
 n(A B)    = A  B    
:
          :
n(AB)=n(A)+n(B)−n(A∩B)n(A B) = n(A) + n(B) - n(A ∩ B)n(AB)=n(A)+n(B)−n(A∩B)
  :
n(AB)=25+20−35=10n(A B) = 25 + 20 - 35 = 10n(AB)=25+20−35=10
:
A B (,  A  B  )  10 
   ?
 A  25   B  20  ,  35        A 
B      ,       ,  -  
   
     25       , 20   ,  35 
   -                
 ,            ( )  
2
   ?
      ,     :
  


 
   
          ,        
         
:  
 ,     
    , , , ,    

       
       
          
 n(A B) = n(A) + n(B) - n(A ∩ B)   ,     
         
         ,   
        ,        ;  
               
2
-
5. (i)            
(ii)        
:  I:    
  ?
     
              ,   
         ,    
        ,        : 
       
          ,    ,    

  :
     ()  
       
      
  ,         :
  X   Y    f     ,  X    x  Y
      y 
     :
󷵻󷵼󷵽󷵾  f(x) = y
,
X   ( )  
Y  (  )
f(x) x      ( )
    
          :
2
 1    
 2    
 3    
          ,        2 
              -     
 
   
         ,          
1. - -  ( )
    ,            
   
󹻂 :
f(x) = x + 2 x = 1 → f(1) = 3x = 2 → f(2) = 4x = 3 → f(3) = 5  -
󹳴󹳵󹳶󹳷          
2.   ( )
   ,   Y     X      
 
         
󹻂 :
 f(x) = x²   {−2, −1, 0, 1, 2} ,   {0, 1, 4}      
 ""   -  
3. --   ( )
     --  --  
󹻂 :
f(x) = x + 1: {1, 2, 3}: {2, 3, 4},       , 
      
2
󹳴󹳵󹳶󹳷            ,     
4.  
      ,     
󹻂 :
() = 5
f(1) = 5, f(2) = 5, f(100) = 5x   , f(x) = 5
󹳴󹳵󹳶󹳷           ,       !
5.  
      
󹻂 :
() = 
f(2) = 2, f(5) = 5     -       
6.  
 x     , : f(x) = x² + 2x + 3
     
7.  
         ,       
󹻂 :
() = (x² + 1) / (x + 2)
     (     )  
8.  
      
󹻂 :
f(x) = 2^x - x  ,     
2
9.  
    
󹻂 :
() = ()
 -      x    
10.  
     
󹻂 :
(x) = (x), (x) = (x)
      
 II:    
,       
  ?
         ,          
     ,     
   !
             ,       

:
 , f(x) = (x² - 1)/(x - 1)
x = 1    :
→ (1² - 1)/(1 - 1) = 0/0 = 󽅂 !
 1      :
(0.9) = (0.81 - 1)/(-0.1) = -1.9
(0.99) = (0.9801 - 1)/(-0.01) = -1.99
(1.01) = (1.0201 - 1)/(0.01) = 2.01
2
        2    
,
󷵻󷵼󷵽󷵾  f(x)   2 ,      :

 f(1)  ,    
      
   :
      (x  )
   :
      (x  )
   ,    
  ?
     
                  
  -   ,  
        :
1.    f(x) 
2.      .
3.          
  :


󰇛
󰇜
󰇛󰇜
  
-    ,      
1. 
       
2
󹳴󹳵󹳶󹳷 :   x < 0   1  x ≥ 0   2
2.  
        
󹳴󹳵󹳶󹳷 : f(x) = 1/x, x = 0      ,  x = 0   
3.   
    -         "   "
󹳴󹳵󹳶󹳷 :
f(x) = (x² - 1)/(x - 1), x = 1        f(x) = x + 1 ,  x = 1  
    
     ?
       
  (  )      
     ( ,  )   
   ,           
 

         :
 ,         -    ,    
 
       -   ()  ,  ()  ,
 (, )  ,    (, )  
               ,  
     ?      -         
    ,        
                   
?      
2
 
,             - ,  
 
           ,       
  -   ,         
6.     log x  ex    
: 󷇴󷇵󷇶󷇷󷇸󷇹 :   
                 
      -            
          ,         
        
      ""    ?
              
      ,   ,       
     
  ,            :
1. ()=
2. ()=
 ,            
󷉃󷉄      ?
            

󼨐󼨑󼨒 :
2
     xxx              
    : xxx  x+h,          ,
 h        -    x   ()     
,          
󽄬󽄭󽄮󽄯󽄰  1:   x   
 f(x)=logx      :
 1:    
   :
,
        
 2:

 h=xt,   h→0,  t→0 
:
 3:     
       :
,
󷃆󼽢  :
2
󼨐󼨑󼨒    ?
    ,          
     (),         , 
                 ,
          
󹸯󹸭󹸮        :
                  
  -    ,         
  logx     :  x         ,  xxx  
    (  )  
     :  x     ( ) ,   x    
( )
󽄬󽄭󽄮󽄯󽄰  2:    ex  
    f(x) = ex    
         ?       
 ! :
      
 1:     
     :
2
,
 2:     
:
󷃆󼽢  :
󼨐󼨑󼨒    ?
 ex            :
 
 
 
  
   ,             
,           ,       
      
󹳣󹳤󹳥  
      
 x>0x > 0x>0   
xxx   -  
 1x\frac{1}{x}x1      xxx    
2
  x   
 x      
x    ex   -      
󷃆󹸊󹸋    

 
 
 x


󰇛
󰇜



󼨻󼨼  
          ,      
                 
  :
      
   -        
        ?
         ,        
 ( logx  ) 
)      
󹲹󹲺󹲻󹲼󹵉󹵊󹵋󹵌󹵍    
1.      ln x2     ( :    
 )
2.        ax log a 

󰇛

󰇜
3. x=1, x=10x,  x=100  ex  logx      
󼨐󼨑󼨒  :
2
         -        
           ,     
-
7. (i) log wrtx   󰇣


󰇤
(ii) log(log)   

󰇜
(iii) x, ax + xx + ex     
:   :    
                  
         ,        ()
  (ˣ)        
            ,   ,  
   
󷇴󷇵󷇶󷇷󷇸󷇹        
1.   ?
     :
=
,
=x
    b      a (    )   
    
   :
log₁₀(x)   log(x)   ( 10) 
ln(x)    ,    e,  e ≈ 2.718.
2.    :
         :
(a × b) =  a +  b
2
( / ) =   
(a) = b  a
3.        :
         :


 x
1 / 
 
1 / 
ˣ
ˣ
ˣ 
[f(x)]
'(x)/(x)
,          
󷃆󼽢  7 (i):  
 [(cx + d)/(ax + b)] wrt x
    
 :
      :
     :
       :
log(f(x))   f'(x)/f(x) 
2
:
\frac{d}{dx}[\log(cx + d)] = \frac{c}{cx + d}]
\frac{d}{dx}[\log(ax + b)] = \frac{a}{ax + b}]
:
󷃆󼽢  :
󷃆󼽢  7 (ii):  
( ^√(2x))
          ,     
 :
       :
 1: e^{√(2x)}  
  :
:
 2:    :
2
   :
    :
    :
󷃆󼽢  :
󷃆󼽢  7 (iii):  
ax + xx + e^x wrt x
  :
    -  
 1: ax   
  :
 2: xx  
        x
     
 :
2
     :
    :
:
   y1=xx   :
 3:  
   :
    :
󷃆󼽢  :
2
󼨐󼨑󼨒  :      ?
         ,       
                 
 
󷃆󹸃󹸄     
               ,    
   
     :
 log   ,  f(x)   
󹳴󹳵󹳶󹳷     ?
        :
1.       ( xx)
2.     (//)
󹴷󹴺󹴸󹴹󹴻󹴼󹴽󹴾󹴿󹵀󹵁󹵂       
        ?
1.  :     ,  ,  
/    
2. : ,         
3.  :         

4. :        ( ) 
  
2
󽄡󽄢󽄣󽄤󽄥󽄦    
    :
()
(ii)
(iii)
󷉃󷉄     
      ,         
                
 ,     
                ,  -
   x^x  log(log(...))      
8. (i)      ,  p = 3        


(ii)     y = 20 + 20x + 0.5x 2,  y    x  , AC
 MC  
:   :       
           , 
            :
1.    
2.   ()    ()
2
    -   -    ,     
󷆰  1:    
         -       
          ,       
  ,          
󹴡󹴵󹴣󹴤     ?
    :
"      ,       ;     ,  
     -     "
            
               :
󹳨󹳤󹳩󹳪󹳫    ()
      
    10%       2%    ,    
    (   )
    20%    ,        ( ) 
          :
:
dq   (        )
p  
q     
 (i):   q=20p+1q = \frac{20}{p + 1}q=p+120   ,     
  p=3p = 3p=3.
2
     :
󷃆󼽢  1: p = 3   q  
 :
  p=3p = 3p=3:
󷃆󼽢  2: 


     :
   :
p=3p = 3p=3 ,    :
󷃆󼽢  3:       
󹸯󹸭󹸮   :
 :
   1   ,  p=3p = 3p=3      :
  1%      1%      
2
          
󹵲󹵳󹵴󹵵󹵶󹵷   :
             ,   
     ,       ,     
             
󼿝󼿞󼿟  2: ,     
               
 :
  -  ,       
  -        
      ,          
        
󼪺󼪻  ()
     :
:
y  
x    
   :
20:   (    )
20x:   
0.5x2:    (,    )
󹴡󹴵󹴣󹴤   ()  ?
  () :
2
,
   :
          - x  ,   
 ,      -          

󼿝󼿞󼿟   ()  ?
  ()        
    :
       :
 ,
     -     ,     ?
    -   ,         
󼨐󼨑󼨒        :
   4    (x=4x = 4x=4)
 1: 
2
 2:  
    :
 3:  
󷙎󷙐󷙏    ?
      ,             :
     ?
    ?
     ?
  ,         ,      
  
󹴷󹴺󹴸󹴹󹴻󹴼󹴽󹴾󹴿󹵀󹵁󹵂  
󹰤󹰥󹰦󹰧󹰨    
           
1    (  )     
:
󹰤󹰥󹰦󹰧󹰨    
         
2
MC          
  ,        
󼨐󼨑󼨒       
                  ,
               -
    ,              
 - ,        
             ,  
               
        
"              
       ,      "