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

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

A

`3/2`

B

`-(3)/(2)`

C

`1/2`

D

`-(1)/(2)`

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The correct Answer is:
D
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