Consider the functionf(x)=6(x4)^2/3

f(x)=6(x-4)^2/3. For this function there are two important intervals:

(,A)and(A,)whereA is a critical number.

A is_____________________

For each of the following intervals, tell whetherf(x)

f(x)is increasing or decreasing.

(,A):Select an answerIncreasing orDecreasing

(A,):Select an answerIncreasingor Decreasing

For each of the following intervals, tell whetherf(x)

f(x)is concave up or concave down.

(,A):Select an answerConcave Upor Concave Down

(A,):Select an answerConcave Upor Concave Down