计算下列定积分. (1)
|
(1)原式=
4xdx-∫ 3-1
x2dx∫ 3-1
=2x2|_-13
=16-28 3
=20 3
(2)原式=
(∫
-π 2 π 2
+1 2
cos2x)dx1 2
=(
x+1 2
sin2x)|_-1 4 π 2 π 2
=
.π 2
计算下列定积分. (1)
|
(1)原式=
4xdx-∫ 3-1
x2dx∫ 3-1
=2x2|_-13
=16-28 3
=20 3
(2)原式=
(∫
-π 2 π 2
+1 2
cos2x)dx1 2
=(
x+1 2
sin2x)|_-1 4 π 2 π 2
=
.π 2