If g(x) = x^2 +x -2 and 1/2 (gof) (x) = ...

If `g(x) = x^2 +x -2 and 1/2 (gof) (x) = 2x^2 - 5x +2` , then f(x) is equal to a)`2x -3` b)`2x+3` c)`2x^2 +3x +1 ` d)`2x^2 -3x -1`

A

`2x -3`

B

`2x+3`

C

`2x^2 +3x +1 `

D

`2x^2 -3x -1`

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The correct Answer is:

A

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