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Q.

Match each entry in List – I to the correct entries in List – II.

 Column – I  Column – II 
P)Real number(s) x satisfying the equation  2x+3x4x+6x9x=1.Then  x=1)6
Q)Real number(s) x  for which  8x+27x12x+18x=76.Then  x=2)1
R)45+2923+452923=3)0
S)If  x55qx+4r  is divisible by (x2)2. Then the  value of  q4)16
  5)An irrational number

The correct option is

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a

P  3, Q  2, R  1, S  4

b

P  3, Q  2, R  5, S  4

c

P  2, Q  1, R  1, S  3

d

P  2, Q  1, R  4, S  5

answer is A.

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Detailed Solution

If  x5+5qx+4r  is divisible by  (x2)2. Find the value of  q  and  r.
p(x)=x55qx+4r  is divisible by  (x2)
 p(2)=03210q+4r=0
 5q=16+2r
 p(x)=x516x2rx+4r
 =x(x2+4)(x+2)(x2)2r(x2)
 =(x2)[x(x+2)(x2+4)2r]
Let  Q(x)=x(x+2)(x2+4)2r
Again  Q(x)  is divisible by  x2  and by factor theorem
 Q(2)=0
2.4.82r=0r=32andq=16

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Match each entry in List – I to the correct entries in List – II. Column – I  Column – II P)Real number(s) x satisfying the equation  2x+3x−4x+6x−9x=1.Then  x=1)6Q)Real number(s) x  for which  8x+27x12x+18x=76.Then  x=2)1R)45+2923+45−2923=3)0S)If  x5−5qx+4r  is divisible by (x−2)2. Then the  value of  q4)16  5)An irrational numberThe correct option is