The derivative of a constant times a function is the constant times the derivative of the function.
Apply the quotient rule, which is:
and .
To find :
Apply the power rule: goes to
To find :
Let .
Apply the power rule: goes to
Then, apply the chain rule. Multiply by :
Differentiate term by term:
The derivative of the constant is zero.
Apply the power rule: goes to
The result is:
The result of the chain rule is:
Now plug in to the quotient rule:
So, the result is:
Now simplify:
The answer is:
1 z*(4 - 2*z) - -------- - ----------- 2 4 (z - 2) (z - 2)
/ 3*z \ 2*|2 - ------| \ -2 + z/ -------------- 3 (-2 + z)
/ 4*z \ 6*|-3 + ------| \ -2 + z/ --------------- 4 (-2 + z)