3 x *(x + 4) ---------- 9
/ 3 \ d |x *(x + 4)| --|----------| dx\ 9 /
The derivative of a constant times a function is the constant times the derivative of the function.
Apply the product rule:
; to find :
Apply the power rule: goes to
; to find :
Differentiate term by term:
Apply the power rule: goes to
The derivative of the constant is zero.
The result is:
The result is:
So, the result is:
Now simplify:
The answer is:
3 2 x x *(x + 4) -- + ---------- 9 3