What is the extreme f(x)=(12x)/(9+x^2) ?

The extreme f(x)=(12x)/(9+x^2) is Minimum(-3,-2),Maximum(3,2)

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extreme f(x)=(12x)/(9+x^2)

extreme points

f (x) = \frac{12 x}{9 + x ^{2}}

Minimum (- 3, - 2), Maximum (3, 2)

Solution steps

f^{'} (x) = \frac{12 ( 9 - x ^{2} )}{( 9 + x ^{2} ) ^{2}}

Find intervals:

Decreasing

: - \infty < x < - 3,

Increasing

: - 3 < x < 3,

Decreasing

: 3 < x < \infty

Plug

x = - 3

into

\frac{12 x}{9 + x ^{2}} : - 2

Minimum (- 3, - 2)

Plug

x = 3

into

\frac{12 x}{9 + x ^{2}} : 2

Maximum (3, 2)

Minimum (- 3, - 2), Maximum (3, 2)

What is the extreme f(x)=(12x)/(9+x^2) ?
The extreme f(x)=(12x)/(9+x^2) is Minimum(-3,-2),Maximum(3,2)