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If `f: R to R` is defined by `f (x)= x^2 + 1`, then values of `f^(-1) (17) and f^(-1)(-3)` respectively are

A

`phi{4,-4}`

B

`{3,-3}phi`

C

`phi{3,-3}`

D

`{4,-4}phi`

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The correct Answer is:
D
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