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