1 / | | 2 - x | -------- dx | 2 | 1 + 9*x | / 0
Integral((2 - x)/(1 + 9*x^2), (x, 0, 1))
/ | | 2 - x | -------- dx | 2 | 1 + 9*x | /
/ 9*2*x \ |--------------| /2\ | 2 | |-| 2 - x \9*x + 0*x + 1/ \1/ -------- = - ---------------- + ----------- 2 18 2 1 + 9*x (-3*x) + 1
/ | | 2 - x | -------- dx | 2 = | 1 + 9*x | /
/ | | 9*2*x | -------------- dx | 2 / | 9*x + 0*x + 1 | | | 1 / 2* | ----------- dx - -------------------- | 2 18 | (-3*x) + 1 | /
/ | | 9*2*x - | -------------- dx | 2 | 9*x + 0*x + 1 | / ---------------------- 18
2 u = 9*x
/ | | 1 - | ----- du | 1 + u | / -log(1 + u) ------------- = ------------ 18 18
/ | | 9*2*x - | -------------- dx | 2 | 9*x + 0*x + 1 | / 2\ / -log\1 + 9*x / ---------------------- = --------------- 18 18
/ | | 1 2* | ----------- dx | 2 | (-3*x) + 1 | /
v = -3*x
/ | | 1 2* | ------ dv = 2*atan(v) | 2 | 1 + v | /
/ | | 1 2*atan(3*x) 2* | ----------- dx = ----------- | 2 3 | (-3*x) + 1 | /
/1 2\ log|- + x | \9 / 2*atan(3*x) C - ----------- + ----------- 18 3
/ | / 2\ | 2 - x log\1 + 9*x / 2*atan(3*x) | -------- dx = C - ------------- + ----------- | 2 18 3 | 1 + 9*x | /
log(9) log(10/9) 2*atan(3) - ------ - --------- + --------- 18 18 3
=
log(9) log(10/9) 2*atan(3) - ------ - --------- + --------- 18 18 3
-log(9)/18 - log(10/9)/18 + 2*atan(3)/3
Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.