What is the critical 3x^3-9x+1 ?

The critical 3x^3-9x+1 is x=-1,x=1

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critical 3x^3-9x+1

critical points

3 x^{3} - 9 x + 1

x = - 1, x = 1

Solution steps

3 x^{3} - 9 x + 1

Find where

f^{'} (x)

is equal to zero or undefined

x = - 1, x = 1

Identify critical points not in

f (x)

domain

Domain of

3 x^{3} - 9 x + 1 : - \infty < x < \infty

All critical points are in domain

x = - 1, x = 1

3 cos (4 x)

f (x) = x^{4} - 18 x^{2}

f (x) = x^{3} - 3 x^{2} - 13 x + 15

f (x) = x^{\frac{5}{2}} - 8 x^{2}

(1, 13), (27, 21)