Hey Adam.
Chain rule:
Factor:
Hello, ^_^Engineer_Adam^_^!
Your chain rule is a bit off . . .
Find the derivative: .
Answer: .
We have: .
Then: .
Therefore: .
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
We could have simplified at the very beginning . . .
We have: .
Then: .
. . . . .