1 / | | 4 | ------ dx | 2 | 3 + x | / 0
Integral(4/(3 + x^2), (x, 0, 1))
/ | | 4 | ------ dx | 2 | 3 + x | /
/4\ |-| 4 \3/ ------ = ---------------- 2 2 3 + x / ___ \ |-\/ 3 | |-------*x| + 1 \ 3 /
/ | | 4 | ------ dx | 2 = | 3 + x | /
/ | | 1 4* | ---------------- dx | 2 | / ___ \ | |-\/ 3 | | |-------*x| + 1 | \ 3 / | / ------------------------ 3
/ | | 1 4* | ---------------- dx | 2 | / ___ \ | |-\/ 3 | | |-------*x| + 1 | \ 3 / | / ------------------------ 3
___ -x*\/ 3 v = --------- 3
/ | | 1 4* | ------ dv | 2 | 1 + v | / 4*atan(v) -------------- = --------- 3 3
/ | | 1 4* | ---------------- dx | 2 | / ___ \ | |-\/ 3 | | |-------*x| + 1 / ___\ | \ 3 / ___ |x*\/ 3 | | 4*\/ 3 *atan|-------| / \ 3 / ------------------------ = --------------------- 3 3
/ ___\ ___ |x*\/ 3 | 4*\/ 3 *atan|-------| \ 3 / C + --------------------- 3
/ ___\ / ___ |x*\/ 3 | | 4*\/ 3 *atan|-------| | 4 \ 3 / | ------ dx = C + --------------------- | 2 3 | 3 + x | /
___ 2*pi*\/ 3 ---------- 9
=
___ 2*pi*\/ 3 ---------- 9
2*pi*sqrt(3)/9
Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.