1 / | | x + 4 | ------------- dx | 2 | x - 4*x + 13 | / 0
/ | | x + 4 | 1*------------- dx | 2 | x - 4*x + 13 | /
/ 1*2*x - 4 \ |---------------| /6\ | 2 | |-| x + 4 \1*x - 4*x + 13/ \9/ ------------- = ----------------- + -------------- 2 2 2 x - 4*x + 13 / x 2\ |- - + -| + 1 \ 3 3/
/ | | x + 4 | 1*------------- dx | 2 = | x - 4*x + 13 | /
/ | / | 1 | 2* | -------------- dx | 1*2*x - 4 | 2 | --------------- dx | / x 2\ | 2 | |- - + -| + 1 | 1*x - 4*x + 13 | \ 3 3/ | | / / --------------------- + ---------------------- 2 3
/ | | 1*2*x - 4 | --------------- dx | 2 | 1*x - 4*x + 13 | / --------------------- 2
2 u = x - 4*x
/ | | 1 | ------ du | 13 + u | / log(13 + u) ------------ = ----------- 2 2
/ | | 1*2*x - 4 | --------------- dx | 2 | 1*x - 4*x + 13 | / 2 \ / log\13 + x - 4*x/ --------------------- = ------------------ 2 2
/ | | 1 2* | -------------- dx | 2 | / x 2\ | |- - + -| + 1 | \ 3 3/ | / ---------------------- 3
2 x v = - - - 3 3
/ | | 1 2* | ------ dv | 2 | 1 + v | / 2*atan(v) -------------- = --------- 3 3
/ | | 1 2* | -------------- dx | 2 | / x 2\ | |- - + -| + 1 | \ 3 3/ | / / 2 x\ ---------------------- = 2*atan|- - + -| 3 \ 3 3/
/ 2 \ log\13 + x - 4*x/ / 2 x\ C + ------------------ + 2*atan|- - + -| 2 \ 3 3/
/ | / 2 \ | x + 4 log\13 + x - 4*x/ / 2 x\ | ------------- dx = C + ------------------ + 2*atan|- - + -| | 2 2 \ 3 3/ | x - 4*x + 13 | /
log(10) log(13) ------- - 2*atan(1/3) + 2*atan(2/3) - ------- 2 2
=
log(10) log(13) ------- - 2*atan(1/3) + 2*atan(2/3) - ------- 2 2
Данные примеры также можно применять при вводе верхнего и нижнего предела интегрирования.