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Popular >

extreme f(x)=x^4-x^3

Solution

extreme points

f (x) = x^{4} - x^{3}

Solution

Saddle (0, 0), Minimum (\frac{3}{4}, - \frac{27}{256})

Solution steps

f^{'} (x) = 4 x^{3} - 3 x^{2}

Find intervals:

Decreasing

: - \infty < x < 0,

Decreasing

: 0 < x < \frac{3}{4},

Increasing

: \frac{3}{4} < x < \infty

Plug

x = 0

into

x^{4} - x^{3} : 0

Saddle (0, 0)

Plug

x = \frac{3}{4}

into

x^{4} - x^{3} : - \frac{27}{256}

Minimum (\frac{3}{4}, - \frac{27}{256})

Saddle (0, 0), Minimum (\frac{3}{4}, - \frac{27}{256})

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Frequently Asked Questions (FAQ)

What is the extreme f(x)=x^4-x^3 ?
The extreme f(x)=x^4-x^3 is Saddle(0,0),Minimum(3/4 ,-27/256)