Let .
Apply the power rule: goes to
Then, apply the chain rule. Multiply by :
Differentiate term by term:
Apply the power rule: goes to
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 result is:
The result of the chain rule is:
Now simplify:
The answer is:
/ 2\ | (-1 + 2*x) | -|1 + -----------| \ 4*x*(1 - x)/ ------------------- ___________ \/ x*(1 - x)
/ 2\ | (-1 + 2*x) | -3*(-1 + 2*x)*|4 + -----------| \ x*(1 - x) / ------------------------------- 3/2 8*(x*(1 - x))