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If f(x)=(x^2-1)/(x^2+1) . For every real...

If `f(x)=(x^2-1)/(x^2+1)` . For every real number `x ,` then the minimum value of `fdot` (a) does not exist because `f` is unbounded (b) is not attained even through `f` is bounded (c) is equal to 1 (d) is equal to `-1`

A

does not exist because f is unbounded

B

is not attained even though f is

C

is 1

D

is -1

Text Solution

Verified by Experts

The correct Answer is:
D
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