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Q.

If f(x) is a polynomial in x(>0) satisfying the equationf(x)+f1x=f(x).f1x. and f(2)=−7,then f(3)=_______

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a

-36

b

-46

c

-26

d

-16

answer is C.

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Detailed Solution

f(x)f(1x)=f(x)+f1x ⇒fx=1±xn givenf2=-7⇒1±2n=-7⇒n=3 fx=1-x3

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