Let .
Apply the power rule: goes to
Then, apply the chain rule. Multiply by :
Differentiate term by term:
The derivative of a constant times a function is the constant times the derivative of the function.
Apply the power rule: goes to
So, the result is:
The derivative of the constant is zero.
The result is:
The result of the chain rule is:
Now simplify:
The answer is:
n a*n*(a*x + b) -------------- a*x + b
2 n
n*a *(b + a*x) *(-1 + n)
------------------------
2
(b + a*x)