2 / | | 1 | ------------ dx | 2 | x - 4*x + 6 | / -oo
Integral(1/(x^2 - 4*x + 6), (x, -oo, 2))
/ | | 1 | ------------ dx | 2 | x - 4*x + 6 | /
1 1 ------------ = ---------------------------- 2 / 2 \ x - 4*x + 6 |/ ___ \ | ||-\/ 2 ___| | 2*||-------*x + \/ 2 | + 1| \\ 2 / /
/ | | 1 | ------------ dx | 2 = | x - 4*x + 6 | /
/ | | 1 | ------------------------ dx | 2 | / ___ \ | |-\/ 2 ___| | |-------*x + \/ 2 | + 1 | \ 2 / | / ------------------------------ 2
/ | | 1 | ------------------------ dx | 2 | / ___ \ | |-\/ 2 ___| | |-------*x + \/ 2 | + 1 | \ 2 / | / ------------------------------ 2
___ ___ x*\/ 2 v = \/ 2 - ------- 2
/ | | 1 | ------ dv | 2 | 1 + v | / atan(v) ------------ = ------- 2 2
/ | | 1 | ------------------------ dx | 2 | / ___ \ | |-\/ 2 ___| | |-------*x + \/ 2 | + 1 / ___\ | \ 2 / ___ | ___ x*\/ 2 | | \/ 2 *atan|- \/ 2 + -------| / \ 2 / ------------------------------ = ----------------------------- 2 2
/ ___\ ___ | ___ x*\/ 2 | \/ 2 *atan|- \/ 2 + -------| \ 2 / C + ----------------------------- 2
/ ___ \ / ___ |\/ 2 *(-2 + x)| | \/ 2 *atan|--------------| | 1 \ 2 / | ------------ dx = C + -------------------------- | 2 2 | x - 4*x + 6 | /
___ 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.