1 / | | 1 | -------------- dx | 2 | 9*x + 6*x + 4 | / 0
Integral(1/(9*x^2 + 6*x + 4), (x, 0, 1))
/ | | 1 | -------------- dx | 2 | 9*x + 6*x + 4 | /
1 1 -------------- = --------------------------- 2 / 2 \ 9*x + 6*x + 4 |/ ___\ | || ___ \/ 3 | | 3*||-\/ 3 *x - -----| + 1| \\ 3 / /
/ | | 1 | -------------- dx | 2 = | 9*x + 6*x + 4 | /
/ | | 1 | ----------------------- dx | 2 | / ___\ | | ___ \/ 3 | | |-\/ 3 *x - -----| + 1 | \ 3 / | / ----------------------------- 3
/ | | 1 | ----------------------- dx | 2 | / ___\ | | ___ \/ 3 | | |-\/ 3 *x - -----| + 1 | \ 3 / | / ----------------------------- 3
___ \/ 3 ___ v = - ----- - x*\/ 3 3
/ | | 1 | ------ dv | 2 | 1 + v | / atan(v) ------------ = ------- 3 3
/ | | 1 | ----------------------- dx | 2 | / ___\ | | ___ \/ 3 | | |-\/ 3 *x - -----| + 1 / ___ \ | \ 3 / ___ |\/ 3 ___| | \/ 3 *atan|----- + x*\/ 3 | / \ 3 / ----------------------------- = --------------------------- 3 9
/ ___ \ ___ |\/ 3 ___| \/ 3 *atan|----- + x*\/ 3 | \ 3 / C + --------------------------- 9
/ | ___ / ___ \ | 1 \/ 3 *atan\\/ 3 *(1/3 + x)/ | -------------- dx = C + --------------------------- | 2 9 | 9*x + 6*x + 4 | /
/ ___\ ___ |4*\/ 3 | ___ \/ 3 *atan|-------| pi*\/ 3 \ 3 / - -------- + ------------------- 54 9
=
/ ___\ ___ |4*\/ 3 | ___ \/ 3 *atan|-------| pi*\/ 3 \ 3 / - -------- + ------------------- 54 9
-pi*sqrt(3)/54 + sqrt(3)*atan(4*sqrt(3)/3)/9
Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.