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Q.

If x+1(xa)(x3)=2xa+bx3 , then (a,b)=

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a

(7,1)

b

(4,1)

c

(4,1)

d

(4,4)

answer is A.

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Detailed Solution

x+1(xa)(x3)=2xa+bx3

x+1=2(x3)+b(xa)

Put x=3

4=b(3a)(1)

Put x=a

a+1=2(a3)a=7

4=3bab4=3b7bb=1

(a,b)= (7,1)

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