《高等数学》不定积分课后习题详解Word文档格式.docx
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在某一区间内不连续,则在这个区间内f?
必无原函数.[]5.y?
ln?
ax?
与y?
lnx是同一函数的原函数.[]三.单项选择题
1.c为任意常数,且F'
(x)=f(x),下式成立的有。
(A)?
F'
(x)dx?
f(x)+c;
(B)?
f(x)dx=F(x)+c;
(C)?
F(x)dx?
(x)+c;
(D)?
f'
(x)dx=F(x)+c.
2.F(x)和G(x)是函数f(x)的任意两个原函数,f(x)?
0,则下式成立的有。
(A)F(x)=cG(x);
(B)F(x)=G(x)+c;
(C)F(x)+G(x)=c;
(D)F(x)?
G(x)=c.3.下列各式中是f(x)?
sin|x|的原函数。
(A)y?
cos|x|;
(B)y=-|cosx|;
(c)y=?
cosx,x?
0,cosx?
2,x?
0;
(D)y=?
cosx?
c1,x?
c2,x?
0.
c1、c2任意常数。
4.F?
f(x),f(x)为可导函数,且f(0)=1,又F(x)?
xf(x)?
x2,则f(x)=______.(A)?
2x?
1(B)?
1(C)?
1(D)?
15.设f?
(sin2x)?
cos2x,则f(x)=________.
1
(A)sinx?
sin2x?
c;
(B)x?
1x2?
(C)sin2x?
1sin4x?
(D)x2?
1x4?
2222
2
6.设a是正数,函数f(x)?
ax,?
axlogae,则______.(A)f(x)是?
(x)的导数;
(B)?
(x)是f(x)的导数;
(C)f(x)是?
(x)的原函数;
(D)?
(x)是f(x)的不定积分。
四.计算题
1.?
xndx
2.?
dh2gh
(g是常数)
3.x?
1)(x?
1)dx4.
5.e(1?
(1?
x)2
x
e?
xx
)dx6.?
32xe3xdx
4sin3x?
22x?
2
dx7.?
8.?
sinxx?
xx21?
cos2x
dx9.?
(cos?
sin)dx10.?
221?
cos2x22?
3x?
33?
2x
dx12.?
dx11.?
sin2xcos2x3x
13.(
15.(1?
五.应用题
1.一曲线通过点(e,3),且在任一点处的切线的斜率等于该点横坐标的倒数,求该曲线的方程.
2.一物体由静止开始运动,经t秒后的速度是3t(米/秒),问:
(1)在3秒后物体离开出发点的距离是多少?
(2)物体走完360米需要多少时间
2
32
)dx14.?
secx(secx?
tanx)dx
21?
x2?
x
)xxdx16.x2
dx1?
4-2换元积分法
一、填空题
1.dx?
______d(ax)((a?
0))2.dx?
______d(7x?
3)3.xdx?
_______d(x2)4.xdx?
______d(5x2)5.xdx?
______d(1?
x2)6.x2dx?
_______d(2?
3x3)7.edx?
______d(e)8.e
2x2x
dx?
e)
1)dx?
d(______)3
x2
9.xe?
2xdx?
d(_______)10.cos(11.
dxdx
______d(5lnx)12.?
______d(3?
5lnx)xx
13.sin(?
t?
)dt?
d(______)14.
arcsinx)
15.
1xx?
1
11
()2
_________1?
xd
16.若
f(x)dx?
F(x)?
c,则?
f(ax?
b)dx?
________(a?
0)
二.是非判断题
lnx1?
1?
111.?
d?
2?
c.[]
xx?
2x12.
1xdx?
2arctgx?
c.[]3.设f?
sinx?
c,则f?
arcsinx?
4.已知f?
lnx?
1,0?
1,
x,?
0,?
且f?
0?
0,且f?
x.[]
x,1?
?
e?
1,0?
5.?
sin2xdx?
1sin3x?
c.[]36.若?
F?
c,则?
g?
c.[]三.单项选择题1.?
(3x)dx?
_____.(A)
f(x)?
(B)f(3x)?
33
(C)3f(x)?
(D)3f(3x)?
2.
f?
(x)
.?
[f(x)]2dx?
________
(A)ln|1?
f(x)|?
(B)1ln|1?
[f(x)]2|?
2(C)arctan[f(x)]?
(D)1arctan[f(x)]?
c.
3.?
.?
(A)
2ln|x|?
C(B)?
C
xx
(C)?
C(D)ln|x|?
x3?
3x
..4.x
2?
33
3x?
2ln?
()x?
(A)(B)3x?
2x(3)x?
c22
3?
(C)3?
(D)3?
c?
c?
ln3?
ln2?
ln3?
5.
x7
x(1?
x7)dx?
______.
7
x(A)1ln|
7(1?
x7)2
1x7
|?
(B)7ln|1?
x7|?
1x61x6
(C)ln||?
|?
(D)ln|662
61?
x6(1?
x)
6.|x|dx?
_____.(A)
1111
|x|2?
(B)x2?
(c)x|x|?
(D)?
e3x?
7.?
xdx?
_____.
(A)e2x?
ex?
(B)e2x?
22
(C)e2x?
(D)e2