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Let f: RrarrR be defined by f(x) = x^2 ...

Let `f: RrarrR` be defined by `f(x) = x^2 + 1` Then, pre images of 17 and -3 respectively, are

A

`pi, {4,4}`

B

`{3,-3},pi`

C

`{4,-4}, phi`

D

`{4},{2}`

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