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