, For Every Real Number, Then Minimum Value Of f

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Question

, for every real number, then minimum value of f

easy

Solution

Correct option is

is equal to – 1

f (x) will be minimum if 2/(x² + 1) is maximum i.e. if x² + 1 is least i.e. whenx = 0. Thus, minimum value of f (x) is f (0) = –1.

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