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