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Q.

If 1x(x2+a2)=Ax+Bx+Cx2+a2 , then

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a

AB=0

b

A+B=0

c

C=0

d

A+B+C=0

answer is D.

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Detailed Solution

1x(x2+a2)=Ax+Bx+Cx2+a2

1x(x2+a2)=A(x2+a2)+(Bx+C)xx(x2+a2)

1=A(x2+a2)+(Bx+C)x

1=Ax2+Aa2+Bx2+Cx

1=x2(A+B)+Cx+Aa2

A+B=0(1)

C=0(2)

A=1a2

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