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Let g: Rvec(0,pi/3) be defined by g(x)=c...

Let `g: Rvec(0,pi/3)` be defined by `g(x)=cos^(-1)((x^2-k)/(1+x^2))` . Then find the possible values of `k` for which `g` is a subjective function.

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The correct Answer is:
`k=-1/2`
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