If f : R ---->R defined by f(x) = x2 + 1, then values of f -1 (17) and f -1(-3) are respectively

If f : R ---->R defined by f(x) = x2 + 1, then values

1.	If f : R ---->R defined by f(x) = x2 + 1, then values of f -1 (17) and  f -1(-3) are respectively
A.	{Ø}, (4, - 4)
B.	{3,-3},{Ø}
C.	{Ø},{3,-3}
D.	{4,-4},Ø
Answer» E.

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&nbsp;If&nbsp;f&nbsp;:&nbsp;R&nbsp;----&gt;R&nbsp;defined&nbsp;by&nbsp;f(x)&nbsp;=&nbsp;x2&nbsp;+&nbsp;1,&nbsp;then&nbsp;values&nbsp;of&nbsp;f&nbsp;-1&nbsp;(17)&nbsp;and&nbsp;&nbsp;f&nbsp;-1(-3)&nbsp;are&nbsp;respectively

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If f : R ---->R defined by f(x) = x2 + 1, then values of f -1 (17) and f -1(-3) are respectively