If g(x)=x^(2)+x-1 and g(f(x))=4x^(2)-10x...

If `g(x)=x^(2)+x-1 and g(f(x))=4x^(2)-10x+5` then find `f((5)/(4))`

A

`3/2`

B

`-(1)/(2)`

C

`(1)/(2)`

D

`-(3)/(2)`

Verified by Experts

The correct Answer is:

B

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