Question

Find the critical numbers of the function. (Enter your answers as a comma-separated list.)

f(x) = 10x2 + 3x

Answer 1

the critical number is, x = -3/20

Explanation:

to find the critical number take derivative of both sides,

f(x) = 10x² + 3x

f¬(x) = 10(2x) + 3(1)

as derivative of x² = 2x and

derivative of x = 1

= 20x + 3

0 = 20x + 3

-3 = 20x

x = -3/20