1 / | | 7*x + 1 | ------------- dx | 2 | x + 8*x + 20 | / 0
Integral((7*x + 1)/(x^2 + 8*x + 20), (x, 0, 1))
/ | | 7*x + 1 | ------------- dx | 2 | x + 8*x + 20 | /
2*x + 8 7*------------- /-27 \ 2 |----| 7*x + 1 x + 8*x + 20 \ 4 / ------------- = --------------- + -------------- 2 2 2 x + 8*x + 20 / x \ |- - - 2| + 1 \ 2 /
/ | | 7*x + 1 | ------------- dx | 2 = | x + 8*x + 20 | /
/ | | 1 / 27* | -------------- dx | | 2 | 2*x + 8 | / x \ 7* | ------------- dx | |- - - 2| + 1 | 2 | \ 2 / | x + 8*x + 20 | | / / - ----------------------- + --------------------- 4 2
/ | | 2*x + 8 7* | ------------- dx | 2 | x + 8*x + 20 | / --------------------- 2
2 u = x + 8*x
/ | | 1 7* | ------ du | 20 + u | / 7*log(20 + u) -------------- = ------------- 2 2
/ | | 2*x + 8 7* | ------------- dx | 2 | x + 8*x + 20 | / 2 \ / 7*log\20 + x + 8*x/ --------------------- = -------------------- 2 2
/ | | 1 -27* | -------------- dx | 2 | / x \ | |- - - 2| + 1 | \ 2 / | / ------------------------ 4
x v = -2 - - 2
/ | | 1 -27* | ------ dv | 2 | 1 + v | / -27*atan(v) ---------------- = ----------- 4 4
/ | | 1 -27* | -------------- dx | 2 | / x \ | |- - - 2| + 1 | \ 2 / / x\ | -27*atan|2 + -| / \ 2/ ------------------------ = --------------- 4 2
/ x\ 27*atan|2 + -| / 2 \ \ 2/ 7*log\20 + x + 8*x/ C - -------------- + -------------------- 2 2
/ / x\ | 27*atan|2 + -| / 2 \ | 7*x + 1 \ 2/ 7*log\20 + x + 8*x/ | ------------- dx = C - -------------- + -------------------- | 2 2 2 | x + 8*x + 20 | /
27*atan(5/2) 7*log(20) 7*log(29) 27*atan(2) - ------------ - --------- + --------- + ---------- 2 2 2 2
=
27*atan(5/2) 7*log(20) 7*log(29) 27*atan(2) - ------------ - --------- + --------- + ---------- 2 2 2 2
-27*atan(5/2)/2 - 7*log(20)/2 + 7*log(29)/2 + 27*atan(2)/2
Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.