1 / | | x + 2 | ------ dx | 2 | x + 4 | / 0
/ | | x + 2 | 1*------ dx | 2 | x + 4 | /
/ 1*2*x + 0 \ |--------------| /2\ | 2 | |-| x + 2 \1*x + 0*x + 4/ \4/ ------ = ---------------- + -------------- 2 2 2 x + 4 / x \ |- - + 0| + 1 \ 2 /
/ | | x + 2 | 1*------ dx | 2 = | x + 4 | /
/ | | 1 / | -------------- dx | | 2 | 1*2*x + 0 | / x \ | -------------- dx | |- - + 0| + 1 | 2 | \ 2 / | 1*x + 0*x + 4 | | / / -------------------- + -------------------- 2 2
/ | | 1*2*x + 0 | -------------- dx | 2 | 1*x + 0*x + 4 | / -------------------- 2
2 u = x
/ | | 1 | ----- du | 4 + u | / log(4 + u) ----------- = ---------- 2 2
/ | | 1*2*x + 0 | -------------- dx | 2 | 1*x + 0*x + 4 | / 2\ / log\4 + x / -------------------- = ----------- 2 2
/ | | 1 | -------------- dx | 2 | / x \ | |- - + 0| + 1 | \ 2 / | / -------------------- 2
-x v = --- 2
/ | | 1 | ------ dv | 2 | 1 + v | / atan(v) ------------ = ------- 2 2
/ | | 1 | -------------- dx | 2 | / x \ | |- - + 0| + 1 | \ 2 / | / /x\ -------------------- = atan|-| 2 \2/
/ 2\ log\4 + x / /x\ C + ----------- + atan|-| 2 \2/
/ | / 2\ | x + 2 log\4 + x / /x\ | ------ dx = C + ----------- + atan|-| | 2 2 \2/ | x + 4 | /
log(5) log(4) ------ - ------ + atan(1/2) 2 2
=
log(5) log(4) ------ - ------ + atan(1/2) 2 2
Данные примеры также можно применять при вводе верхнего и нижнего предела интегрирования.