Question

need help on the attachment

Answer 1

take the derivate and do a sign analysis. If it is positive it is increasing and if it is negative it is decreasing.

Answer 2

I did I got (16/3)x^3-38x^2-20x+7, how would find the critical numbers from this?

Answer 3

Set that equal to zero and those are your critical points. You should have 3 since it is to the third power.

Answer 4

I know that too, but what can you factor into the function to get the critical numbers

Answer 5

Use synthetic division or a graphing calculator

Answer 6

I got x=-.7132084
x=.24227105
and the last x is between 7 and 8