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If f(x) = 1+x^4, then f(x).f((1)/(x))=...

If `f(x) = 1+x^4`, then `f(x).f((1)/(x))=`

A

`f(x)+f((1)/(x))`

B

`f(x)-f((1)/(x))`

C

`f(x) div f((1)/(x))`

D

none of these

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A
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