Okay, this is my problem:
I solved, and got the derivative of f '(x)= -4/5x(9-x^2)^2-5
Can someone help me and let me know If I got the correct derivative, and if so, where do I go from here? What do I set equal to zero to get the criticals?
Okay, this is my problem:
I solved, and got the derivative of f '(x)= -4/5x(9-x^2)^2-5
Can someone help me and let me know If I got the correct derivative, and if so, where do I go from here? What do I set equal to zero to get the criticals?