1 / | | 1 | ------------- dx | 2 | x + 4*x + 20 | / 0
Integral(1/(x^2 + 4*x + 20), (x, 0, 1))
/ | | 1 | ------------- dx | 2 | x + 4*x + 20 | /
1 1 ------------- = ------------------- 2 / 2 \ x + 4*x + 20 |/ x 1\ | 16*||- - - -| + 1| \\ 4 2/ /
/ | | 1 | ------------- dx | 2 = | x + 4*x + 20 | /
/ | | 1 | -------------- dx | 2 | / x 1\ | |- - - -| + 1 | \ 4 2/ | / -------------------- 16
/ | | 1 | -------------- dx | 2 | / x 1\ | |- - - -| + 1 | \ 4 2/ | / -------------------- 16
1 x v = - - - - 2 4
/ | | 1 | ------ dv | 2 | 1 + v | / atan(v) ------------ = ------- 16 16
/ | | 1 | -------------- dx | 2 | / x 1\ | |- - - -| + 1 | \ 4 2/ /1 x\ | atan|- + -| / \2 4/ -------------------- = ----------- 16 4
/1 x\ atan|- + -| \2 4/ C + ----------- 4
/ /1 x\ | atan|- + -| | 1 \2 4/ | ------------- dx = C + ----------- | 2 4 | x + 4*x + 20 | /
atan(1/2) atan(3/4) - --------- + --------- 4 4
=
atan(1/2) atan(3/4) - --------- + --------- 4 4
-atan(1/2)/4 + atan(3/4)/4
Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.