What is the critical f(x)=4x^3+7x^2-20x+9 ?

The critical f(x)=4x^3+7x^2-20x+9 is x=-2,x= 5/6

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critical f(x)=4x^3+7x^2-20x+9

critical points

f (x) = 4 x^{3} + 7 x^{2} - 20 x + 9

x = - 2, x = \frac{5}{6}

Solution steps

4 x^{3} + 7 x^{2} - 20 x + 9

Find where

f^{'} (x)

is equal to zero or undefined

x = - 2, x = \frac{5}{6}

Identify critical points not in

f (x)

domain

Domain of

4 x^{3} + 7 x^{2} - 20 x + 9 : - \infty < x < \infty

All critical points are in domain

x = - 2, x = \frac{5}{6}

f (x) = \frac{7}{x - 7}

2 x^{2} - 8

- x^{2} - 5

(10, 5), (4, - 1)

f (x) = 1 - 5 x

What is the critical f(x)=4x^3+7x^2-20x+9 ?
The critical f(x)=4x^3+7x^2-20x+9 is x=-2,x= 5/6