What is the extreme f(x)=6x^3-9x^2-216x+3 ?

The extreme f(x)=6x^3-9x^2-216x+3 is Maximum(-3,408),Minimum(4,-621)

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extreme f(x)=6x^3-9x^2-216x+3

extreme points

f (x) = 6 x^{3} - 9 x^{2} - 216 x + 3

Maximum (- 3, 408), Minimum (4, - 621)

Solution steps

f^{'} (x) = 18 x^{2} - 18 x - 216

Find intervals:

Increasing

: - \infty < x < - 3,

Decreasing

: - 3 < x < 4,

Increasing

: 4 < x < \infty

Plug

x = - 3

into

6 x^{3} - 9 x^{2} - 216 x + 3 : 408

Maximum (- 3, 408)

Plug

x = 4

into

6 x^{3} - 9 x^{2} - 216 x + 3 : - 621

Minimum (4, - 621)

Maximum (- 3, 408), Minimum (4, - 621)

f (x, y) = 338 y^{2} + x^{2} - x^{2} y

f (x) = - 5 x^{3} + 15 x + 2

f (x) = - x^{2} + 6, - 3 \leq x \leq 4

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

f (x) = 6 - 5 x - x^{3}

What is the extreme f(x)=6x^3-9x^2-216x+3 ?
The extreme f(x)=6x^3-9x^2-216x+3 is Maximum(-3,408),Minimum(4,-621)