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If for x =0 af(x) +bf(1/x)=1/x-5 where a...

If for x =0 af(x) +bf(1/x)=1/x-5 where `a ne b` then `int_1^2xf(x) dx` is equal to

A

`(b-9a)/(9(a^2-b^2))`

B

`(b-9a)/(b(a^2-b^2))`

C

`(b-9a)/(6(a^2-b^2))`

D

none of these

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The correct Answer is:
D
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