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