# How do you determine whether the function #f(x)=3/(x^2−4)# is concave up or concave down and its intervals?

##### 1 Answer

Jan 6, 2016

Explained below.

#### Explanation:

f '(x)=

For using second derivative test, f " (x)=

Select any test value in these intervals and test for the sign of f "(x).

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