Apply the quotient rule, which is:
and .
To find :
Apply the power rule: goes to
To find :
Differentiate term by term:
The derivative of the constant is zero.
Apply the power rule: goes to
The result is:
Now plug in to the quotient rule:
Now simplify:
The answer is:
2
x 2*x
- -------- + -----
2 x + 1
(x + 1)
/ 2 \
| x 2*x |
2*|1 + -------- - -----|
| 2 1 + x|
\ (1 + x) /
------------------------
1 + x
/ 2 \
| x 2*x |
40320*|1 + -------- - -----|
| 2 1 + x|
\ (1 + x) /
----------------------------
7
(1 + x)