/ | | 1 | ------- dx | x*x + 4 | /
1 1
------- = --------------
x*x + 4 / 2 \
|/-x \ |
4*||---| + 1|
\\ 2 / // | | 1 | ------- dx = | x*x + 4 | /
/
|
| 1
| ---------- dx
| 2
| /-x \
| |---| + 1
| \ 2 /
|
/
----------------
4 /
|
| 1
| ---------- dx
| 2
| /-x \
| |---| + 1
| \ 2 /
|
/
----------------
4 -x
v = ---
2 /
|
| 1
| ------ dv
| 2
| 1 + v
|
/ atan(v)
------------ = -------
4 4 /
|
| 1
| ---------- dx
| 2
| /-x \
| |---| + 1
| \ 2 / /x\
| atan|-|
/ \2/
---------------- = -------
4 2 /x\
atan|-|
\2/
C + -------
2 1 / | | 1 atan(1/2) | ------- dx = --------- | x*x + 4 2 | / 0
0.231823804500403