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