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