Consider the followingSolution aFind the critical numbers En

Consider the following.

Solution

a.Find the critical numbers. (Enter your answers from smallest to largest. Enter NONE in any unused answer blanks.) y\' = 21x^6 = 2x , x> -9 y\'(-9) = 21(-9)^6 = 21 * 9^6 y\'(-9+) = 2*(-9) = -18 x = -9 is the critical point b)Find the open intervals on which the function is increasing or decreasing. (If you need to use or –, enter INFINITY or –INFINITY, respectively. Enter NONE in any unused answer blanks.) Increasing b. x <= -9 y\' is positive increasing in (-infinity, -9] Decreasing x> - 9 y\' is always negative decreasing in [-9, infinity)