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

The extreme f(x)=x+2/x is Maximum(-sqrt(2),-2sqrt(2)),Minimum(sqrt(2),2sqrt(2))

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extreme f(x)=x+2/x

extreme points

f (x) = x + \frac{2}{x}

Maximum (- 2, - 22), Minimum (2, 22)

Solution steps

f^{'} (x) = 1 - \frac{2}{x ^{2}}

Find intervals:

Increasing

: - \infty < x < - 2,

Decreasing

: - 2 < x < 0,

Decreasing

: 0 < x < 2,

Increasing

: 2 < x < \infty

Plug

x = - 2

into

x + \frac{2}{x} : - 22

Maximum (- 2, - 22)

Plug

x = 2

into

x + \frac{2}{x} : 22

Minimum (2, 22)

Maximum (- 2, - 22), Minimum (2, 22)

\frac{( x ^{2} - 9 )}{x ^{3} + 3 x ^{2}}

f (x) = \frac{- x - 2}{x + 4}

f (x) = 0.002 x^{3} + 5 x + 6.244

f (x) = - 5 x - 4

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

What is the extreme f(x)=x+2/x ?
The extreme f(x)=x+2/x is Maximum(-sqrt(2),-2sqrt(2)),Minimum(sqrt(2),2sqrt(2))