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:
4*x ------------- __________ / 2 \/ 4*x + 1
/ 2 \
| 4*x |
4*|1 - --------|
| 2|
\ 1 + 4*x /
----------------
__________
/ 2
\/ 1 + 4*x