Let .
The derivative of is .
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\
| 2*(-2 + x) |
2*|1 - -----------|
\ x*(-4 + x)/
-------------------
x*(-4 + x)
/ 2\
| 4*(-2 + x) |
4*|-3 + -----------|*(-2 + x)
\ x*(-4 + x)/
-----------------------------
2 2
x *(-4 + x)