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