1 / | | 1 | ------------ dx | 2 | x + 3*x + 3 | / 0
Integral(1/(x^2 + 3*x + 3), (x, 0, 1))
/ | | 1 | ------------ dx | 2 | x + 3*x + 3 | /
1 1 ------------ = ------------------------------- 2 / 2 \ x + 3*x + 3 |/ ___ \ | ||-2*\/ 3 ___| | 3/4*||--------*x - \/ 3 | + 1| \\ 3 / /
/ | | 1 | ------------ dx | 2 = | x + 3*x + 3 | /
/ | | 1 4* | ------------------------- dx | 2 | / ___ \ | |-2*\/ 3 ___| | |--------*x - \/ 3 | + 1 | \ 3 / | / --------------------------------- 3
/ | | 1 4* | ------------------------- dx | 2 | / ___ \ | |-2*\/ 3 ___| | |--------*x - \/ 3 | + 1 | \ 3 / | / --------------------------------- 3
___ ___ 2*x*\/ 3 v = - \/ 3 - --------- 3
/ | | 1 4* | ------ dv | 2 | 1 + v | / 4*atan(v) -------------- = --------- 3 3
/ | | 1 4* | ------------------------- dx | 2 | / ___ \ | |-2*\/ 3 ___| | |--------*x - \/ 3 | + 1 / ___\ | \ 3 / ___ | ___ 2*x*\/ 3 | | 2*\/ 3 *atan|\/ 3 + ---------| / \ 3 / --------------------------------- = ------------------------------- 3 3
/ ___\ ___ | ___ 2*x*\/ 3 | 2*\/ 3 *atan|\/ 3 + ---------| \ 3 / C + ------------------------------- 3
/ ___ \ / ___ |2*\/ 3 *(3/2 + x)| | 2*\/ 3 *atan|-----------------| | 1 \ 3 / | ------------ dx = C + ------------------------------- | 2 3 | x + 3*x + 3 | /
/ ___\ ___ |5*\/ 3 | ___ 2*\/ 3 *atan|-------| 2*pi*\/ 3 \ 3 / - ---------- + --------------------- 9 3
=
/ ___\ ___ |5*\/ 3 | ___ 2*\/ 3 *atan|-------| 2*pi*\/ 3 \ 3 / - ---------- + --------------------- 9 3
-2*pi*sqrt(3)/9 + 2*sqrt(3)*atan(5*sqrt(3)/3)/3
Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.