What is the extreme f(x)=-x^3+x^2 ?

The extreme f(x)=-x^3+x^2 is Minimum(0,0),Maximum(2/3 , 4/27)

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extreme f(x)=-x^3+x^2

extreme points

f (x) = - x^{3} + x^{2}

Minimum (0, 0), Maximum (\frac{2}{3}, \frac{4}{27})

Solution steps

f^{'} (x) = - 3 x^{2} + 2 x

Find intervals:

Decreasing

: - \infty < x < 0,

Increasing

: 0 < x < \frac{2}{3},

Decreasing

: \frac{2}{3} < x < \infty

Plug

x = 0

into

- x^{3} + x^{2} : 0

Minimum (0, 0)

Plug

x = \frac{2}{3}

into

- x^{3} + x^{2} : \frac{4}{27}

Maximum (\frac{2}{3}, \frac{4}{27})

Minimum (0, 0), Maximum (\frac{2}{3}, \frac{4}{27})

f (x) = 2 (5 x)^{x}

f (x, y) = 400 - 16 x^{2} - 81 y^{2}

f (x) = ln (7 + x^{2})

y = - x^{3} + \frac{3}{2} x^{2} + 18 x

3 x + 3

What is the extreme f(x)=-x^3+x^2 ?
The extreme f(x)=-x^3+x^2 is Minimum(0,0),Maximum(2/3 , 4/27)