3/2 / | | 1 | -------- dx | 2 | 3 + 4*x | / 1/2
Integral(1/(3 + 4*x^2), (x, 1/2, 3/2))
/ | | 1 | -------- dx | 2 | 3 + 4*x | /
1 1 -------- = --------------------- 2 / 2 \ 3 + 4*x |/ ___ \ | ||-2*\/ 3 | | 3*||--------*x| + 1| \\ 3 / /
/ | | 1 | -------- dx | 2 = | 3 + 4*x | /
/ | | 1 | ----------------- dx | 2 | / ___ \ | |-2*\/ 3 | | |--------*x| + 1 | \ 3 / | / ----------------------- 3
/ | | 1 | ----------------- dx | 2 | / ___ \ | |-2*\/ 3 | | |--------*x| + 1 | \ 3 / | / ----------------------- 3
___ -2*x*\/ 3 v = ---------- 3
/ | | 1 | ------ dv | 2 | 1 + v | / atan(v) ------------ = ------- 3 3
/ | | 1 | ----------------- dx | 2 | / ___ \ | |-2*\/ 3 | | |--------*x| + 1 / ___\ | \ 3 / ___ |2*x*\/ 3 | | \/ 3 *atan|---------| / \ 3 / ----------------------- = --------------------- 3 6
/ ___\ ___ |2*x*\/ 3 | \/ 3 *atan|---------| \ 3 / C + --------------------- 6
/ ___\ / ___ |2*x*\/ 3 | | \/ 3 *atan|---------| | 1 \ 3 / | -------- dx = C + --------------------- | 2 6 | 3 + 4*x | /
___ pi*\/ 3 -------- 36
=
___ pi*\/ 3 -------- 36
pi*sqrt(3)/36
Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.