1 / | | x | ------------- dx | 2 | x + 2*x + 50 | / 0
/ | | x | 1*------------- dx | 2 | x + 2*x + 50 | /
/ 1*2*x + 2 \ |---------------| /-1 \ | 2 | |---| x \1*x + 2*x + 50/ \ 49/ ------------- = ----------------- + -------------- 2 2 2 x + 2*x + 50 / x 1\ |- - - -| + 1 \ 7 7/
/ | | x | 1*------------- dx | 2 = | x + 2*x + 50 | /
/ | / | 1 | | -------------- dx | 1*2*x + 2 | 2 | --------------- dx | / x 1\ | 2 | |- - - -| + 1 | 1*x + 2*x + 50 | \ 7 7/ | | / / --------------------- - -------------------- 2 49
/ | | 1*2*x + 2 | --------------- dx | 2 | 1*x + 2*x + 50 | / --------------------- 2
2 u = x + 2*x
/ | | 1 | ------ du | 50 + u | / log(50 + u) ------------ = ----------- 2 2
/ | | 1*2*x + 2 | --------------- dx | 2 | 1*x + 2*x + 50 | / 2 \ / log\50 + x + 2*x/ --------------------- = ------------------ 2 2
/ | | 1 - | -------------- dx | 2 | / x 1\ | |- - - -| + 1 | \ 7 7/ | / ---------------------- 49
1 x v = - - - - 7 7
/ | | 1 - | ------ dv | 2 | 1 + v | / -atan(v) -------------- = --------- 49 49
/ | | 1 - | -------------- dx | 2 | / x 1\ | |- - - -| + 1 | \ 7 7/ /1 x\ | -atan|- + -| / \7 7/ ---------------------- = ------------- 49 7
/1 x\ / 2 \ atan|- + -| log\50 + x + 2*x/ \7 7/ C + ------------------ - ----------- 2 7
/ /1 x\ | / 2 \ atan|- + -| | x log\50 + x + 2*x/ \7 7/ | ------------- dx = C + ------------------ - ----------- | 2 2 7 | x + 2*x + 50 | /
log(53) log(50) atan(2/7) atan(1/7) ------- - ------- - --------- + --------- 2 2 7 7
=
log(53) log(50) atan(2/7) atan(1/7) ------- - ------- - --------- + --------- 2 2 7 7
Данные примеры также можно применять при вводе верхнего и нижнего предела интегрирования.