1 / | | 3 + x | ------------ dx | 2 | x + 2*x + 5 | / 0
Integral((3 + x)/(x^2 + 2*x + 5), (x, 0, 1))
/ | | 3 + x | ------------ dx | 2 | x + 2*x + 5 | /
/ 2*x + 2 \ |------------| /2\ | 2 | |-| 3 + x \x + 2*x + 5/ \4/ ------------ = -------------- + -------------- 2 2 2 x + 2*x + 5 / x 1\ |- - - -| + 1 \ 2 2/
/ | | 3 + x | ------------ dx | 2 = | x + 2*x + 5 | /
/ | | 1 / | -------------- dx | | 2 | 2*x + 2 | / x 1\ | ------------ dx | |- - - -| + 1 | 2 | \ 2 2/ | x + 2*x + 5 | | / / -------------------- + ------------------ 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/ | / -------------------- 2
1 x v = - - - - 2 2
/ | | 1 | ------ dv | 2 | 1 + v | / atan(v) ------------ = ------- 2 2
/ | | 1 | -------------- dx | 2 | / x 1\ | |- - - -| + 1 | \ 2 2/ | / /1 x\ -------------------- = atan|- + -| 2 \2 2/
/ 2 \ log\5 + x + 2*x/ /1 x\ C + ----------------- + atan|- + -| 2 \2 2/
/ | / 2 \ | 3 + x log\5 + x + 2*x/ /1 x\ | ------------ dx = C + ----------------- + atan|- + -| | 2 2 \2 2/ | x + 2*x + 5 | /
log(8) log(5) pi ------ - atan(1/2) - ------ + -- 2 2 4
=
log(8) log(5) pi ------ - atan(1/2) - ------ + -- 2 2 4
log(8)/2 - atan(1/2) - log(5)/2 + pi/4
Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.