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