1 / | | 1 | ------------ dx | 2 | x + 4*x + 7 | / 0
Integral(1/(x^2 + 4*x + 7), (x, 0, 1))
/ | | 1 | ------------ dx | 2 | x + 4*x + 7 | /
1 1 ------------ = ------------------------------ 2 / 2 \ x + 4*x + 7 |/ ___ ___\ | ||-\/ 3 2*\/ 3 | | 3*||-------*x - -------| + 1| \\ 3 3 / /
/ | | 1 | ------------ dx | 2 = | x + 4*x + 7 | /
/ | | 1 | -------------------------- dx | 2 | / ___ ___\ | |-\/ 3 2*\/ 3 | | |-------*x - -------| + 1 | \ 3 3 / | / -------------------------------- 3
/ | | 1 | -------------------------- dx | 2 | / ___ ___\ | |-\/ 3 2*\/ 3 | | |-------*x - -------| + 1 | \ 3 3 / | / -------------------------------- 3
___ ___ 2*\/ 3 x*\/ 3 v = - ------- - ------- 3 3
/ | | 1 | ------ dv | 2 | 1 + v | / atan(v) ------------ = ------- 3 3
/ | | 1 | -------------------------- dx | 2 | / ___ ___\ | |-\/ 3 2*\/ 3 | | |-------*x - -------| + 1 / ___ ___\ | \ 3 3 / ___ |2*\/ 3 x*\/ 3 | | \/ 3 *atan|------- + -------| / \ 3 3 / -------------------------------- = ----------------------------- 3 3
/ ___ ___\ ___ |2*\/ 3 x*\/ 3 | \/ 3 *atan|------- + -------| \ 3 3 / C + ----------------------------- 3
/ ___ \ / ___ |\/ 3 *(2 + x)| | \/ 3 *atan|-------------| | 1 \ 3 / | ------------ dx = C + ------------------------- | 2 3 | x + 4*x + 7 | /
/ ___\ ___ |2*\/ 3 | \/ 3 *atan|-------| ___ \ 3 / pi*\/ 3 - ------------------- + -------- 3 9
=
/ ___\ ___ |2*\/ 3 | \/ 3 *atan|-------| ___ \ 3 / pi*\/ 3 - ------------------- + -------- 3 9
-sqrt(3)*atan(2*sqrt(3)/3)/3 + pi*sqrt(3)/9
Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.