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Let f (x) =(x^(2) +x-1)/(x ^(2) - x+1),...

Let `f (x) =(x^(2) +x-1)/(x ^(2) - x+1)`, In above problem, the range of `f (x) AA x in [-1, 1]` is:

A

`[-1, (3)/(5)]`

B

` [-1, (5)/(3)]`

C

` [-(1)/(3), 1]`

D

`[-1,1]`

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The correct Answer is:
D
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