What is the extreme x^3-9x^2+15x+8 ?

The extreme x^3-9x^2+15x+8 is Maximum(1,15),Minimum(5,-17)

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extreme x^3-9x^2+15x+8

extreme

Maximum (1, 15), Minimum (5, - 17)

Solution steps

f^{'} (x) = 3 x^{2} - 18 x + 15

Find intervals:

Increasing

: - \infty < x < 1,

Decreasing

: 1 < x < 5,

Increasing

: 5 < x < \infty

Plug

x = 1

into

x^{3} - 9 x^{2} + 15 x + 8 : 15

Maximum (1, 15)

Plug

x = 5

into

x^{3} - 9 x^{2} + 15 x + 8 : - 17

Minimum (5, - 17)

Maximum (1, 15), Minimum (5, - 17)

What is the extreme x^3-9x^2+15x+8 ?
The extreme x^3-9x^2+15x+8 is Maximum(1,15),Minimum(5,-17)