题目内容
计算下列定积分的值
(1)
(x+sinx)dx
(2)
(
+
)26xdx
(3)
dx
(4)
cos2xdx.
(1)
| ∫ |
|
(2)
| ∫ | 31 |
| x |
| 1 | ||
|
(3)
| ∫ | 32 |
| 1-x |
| x2 |
(4)
| ∫ |
|
(1)
(x+sinx)dx=(
x2-cosx)|0
=1+
;
(2)
(
+
)26xdx=
(6x2+12x+6)dx=(2x3+6x2+6x)
=112;
(3)
dx=(-
-lnx)
=ln2-ln3+
;
(4)
cos2xdx=
dx=
(
sin2x+x)
=
.
| ∫ |
|
| 1 |
| 2 |
| π |
| 2 |
| π2 |
| 8 |
(2)
| ∫ | 31 |
| x |
| 1 | ||
|
| ∫ | 31 |
| | | 31 |
(3)
| ∫ | 32 |
| 1-x |
| x2 |
| 1 |
| x |
| | | 32 |
| 1 |
| 5 |
(4)
| ∫ |
|
| ∫ |
|
| cos2x+1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
| | |
|
| π |
| 2 |
练习册系列答案
相关题目