南京邮电大学高数书上的习题答案下册.docx
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南京邮电大学高数书上的习题答案下册
南京邮电大学《高等数学》(下册)习题参考答案
第七章
习题7.1
2.
(1)(x
y)2d
(xy)3d
;⑵
(xy)3d
(x
y)
2d;
D
D
D
D
(3)xyzdv
1
xyzdv;(4)
/22
(xy
z2)2dv
(x2
2
y
z2)dv;
3.
(1)0I
2
;
(2)36
I100;
(3)
32
I.
32^3;
J
3
3
习题7.2
4
2仮
4y
1.
(1)dx
'/0
0
f(x,y)dy
或
0dy/
f(x,y)dx;
r
dx
r
0f(x,y)dy
r
0dy
Jr2y2
严Tf(x,y)dx;
-
dx1f(x,y)dy
-
1
[dy
2
222
Vf(x,y)dx“dyf(x,y)dx;
/y
1
dx
1
二f(x,y)dy
1dx
二f(x,y)dy
1JTT
dx,--2f(x,y)dy
■^4x
2.j'T"X2
dxM2f(x,y)dy或
2
1dy
寸4y2
严f(x,y)dx
1
2dy
>'4y2
寸f(X,y)dx
1
1dy
、‘1y2
才戸f(x,y)dx
1
1dy
、i4y2
尸f(x,y)dx.
2.
(1)
1
0dx
1
-f(x,y)dy;
4
dx
0
Yx
Xf(x,y)dy;
2
1
dx
1
心x2
f(x,y)dy
1
1dy
y21f(x,y)dx;
1
0dyeyf(x,y)dx;
0
1dy
20
3.⑴2°
3
2
4.3
6
(3)7;;(4)e
55
7
5.—.
2
6.
9.
(1)
f(
cos,sin)
(cos
sin
)1
f(cos,sin
sec
0f(
cos,sin)d
f(x,y)dx
2arcsiny'八
9
(5)7;
4
1arcsiny
dy
0丿arcsiny
f(x,y)dx
⑹-1.
17
6
2cos
0f(cos,
Jd
4
csc
f(cos,sin)
2sec
f(
(cossin
)1f(cos,
sec
sec
tan
f(cos
sin
11.
(1)
3
4
⑵721;
(e
41);
12.
(1)
⑵8(
2);
14a4;
⑷I(b3
3、
a).
13.才'
14.
(1)6;
15.
(1)7ln2;
3
⑶-ab.
2
16.
(1)提示:
作变换
(2)提示:
作变换
习题7.3
1.
(1)
1
dx
1
2.
(1)
1
dx
1
1
.^-rdytJ,1x
2
x'
1
jdy
1
r
x2
2
y
f(x,y,z)dz;
1
dx
1
x2
2y2
f(x,y,z)dz;
f(x,y,z)dz;
1
0dx
1xxy
0dy0
f(x,y,z)dz.
4.
(1)
5.
(1)
364'
1;
8;
4;
5;
1
-(In2
2
7
⑵12
7
⑵7
0;
2^2
;⑸
6.直角坐标系
1
dx
1
柱面坐标系
球面坐标系
a4;
22
xy
7
xy
2
f(
32
7.⑴
04d
8.4t2f(t2).
9.k
习题7.4
1、2
1)a.
16
⑶W.
⑶(A5
f(x,y,z)dz;
cos
sin,z)
f(rsincos
R4.
6’
a5).
dz;
rsinsin,rcos
2
3.16R.
)r2sindr.
5.
(1)x0,y
4b
3-
b2aba2
b)
y
0;
0,0,
3(A4a4)
8(A3
3\
a)
0,
0,
6.Ix
7.
(1)
PI
84.
3a;
96
7
o,yo,z
7
T5a;
1126
——a
45
8.Fx
Fy
0,
Fz
G[J(ha)2
R2
Ja2R2
h].
总习题7
1.
(1)(C);
乙;
1R4
4
⑵(A);
(3)(B);(4)(D);
2.
(1)
3.
(1)
4.
(1)
250
3
5.吟
第八章
习题8.1
1.
(1)Ix
2.
(1)
(2)0;
9R2;
hf(0)].
Ly2(x,y)ds,
Lx(x,y)ds
a2n
(x,y)ds
(2)168血
a3.
Iy
e2);
(x,y)ds;
Ly(x,y)ds
L(x,y)ds
(5)9;
256
15
3.质心在扇形的对称轴上且与圆心的距离为
asin
(2才)
4.76k.
2;
3
6.
(1)-a;
14
15;
k33
⑷丁
a2
⑸13;
34
7.
(1)34
⑵11;(3)14;
32
(4)32
9.—a3.
2
10.⑴P(x,y)Q(x,y)ds;
(2)P(x,y)lxQ(x,y)
L‘L
8.mg(Z2Zi);
J14x2
ds;
⑶l[J2xx2P(x,y)(1x)Q(x,y)]ds.
11.L
P(x,y,z)2xQ(x,y,z)」yR(x,y,z)ds
4x2
9y2
习题8.2
1.
(1)
8;
30
2.
(1)
12;
0;
4
?
a;
⑵sin2
3.
(1)
4.
(1)
5;
2;
12-x
2
⑵236;
2xyly2;
习题8.3
1.Ix
(y
z2)
3.
(1)
13
4.
(1)
4J61;
5;
2
ycosx
2
xcosy;
4x2y212ey12yey.
(x,y,z)dS.
149
⑵石
30
I7;
4;
⑶空
10
a(a2
h2);
⑷64^a4.
15
2
5.一
15
2
6.
(1)——R7;
105
(6^/3
1).
7.
(1)(|P
5
|Q
⑵3;
2也R)dS;
2xP
2yQR
J1
4x2
dS.
4y2
8.8.习题8.4
3;
2;
1.
(1)
12
⑵T
81
2.
(1)
0;
a3(2
2
a6-);
3.
(1)
2x
2y
2z;
(2)yexyxsin(xy)
2xzsin(xz2);
(3)2x.
1.⑴
a2;
⑵2a(ab);(3)20;
(3)[xsin(cosz)
222
xycos(xz)]iysin(cosz)j[yzcos(xz)xcosy]k
3.
(1)0;
(2)4.
4.
(1)2;
⑵12
J
6.0.
总习题8
1.
(1)12a;
⑵
4a;
(3)4;
⑷6;
(5)2R3(
2
22);
(6)2R3
;(7)(C);(8)(B).
2.
(1)72ln3
(1
—)ln2-
42
2/22
2arctanj2;
⑵18;
⑶
0;⑷
a2;
⑸16.
H
3.
(1)2arctan—
R
-;
(2)
1J
4h;
⑶2;
4.8.
5.
1
2.
6.2.
a
7.孙
b
1—J
V3
c
73,
Wmaxabc.
9
3
8.—.
2
习题9.1
1.
(1)Un
2n
⑵Un(
n1n1
1)——;n
(n
1)ln(n1);
(3)Un
nx
1
(4)Un(
1)n1sinnx
n
(n
1)!
;
2.⑴
(1)收敛;
(2)发散;⑶收敛;⑷
(1)发散;
(2)发散;⑶发散;⑷
发散.
收敛;(5)
2.
3.
4.提示:
利用数列收敛与其子列收敛之间的关系
5.提示:
s2n1
习题9.2
1.
(1)
2.
(1)
⑺
S2nU2n1・
发散;
发散;
收敛;
(2)收敛;(3)发散;(4)收敛;(5)
(2)收敛;(3)发散;(4)收敛;(5)
(8)ba时收敛,ba时发散,
收敛.
收敛;
收敛;(6)收敛;(6)ba不能确定.
3.
(1)收敛;⑵
4.
(1)绝对收敛;
收敛;⑶收敛;⑷发散;⑸收敛;⑹收敛.
(2)条件收敛;(3)条件收敛;(4)发散;(5)条件收敛;(6)条件收敛.
6.提示:
a
a1
bn
b
7.提示:
n
—(Un
2
A).n
8.提示:
cnan
bn
an.9.提示:
10.当|a|
1时绝对收敛,
当\a\1时发散,
a1时条件收敛,a1时发散.
习题9.3
1.
(1)
1,[1,1];
R2,[
1,1];
⑶R1,[1,1];
);
3,[0,6);
i,[
1,0).
2.
(1)
x1);
⑵占
(1x
1);
(^(1
x1);
(4)^
ln(1x)(
1).
3.s(x)
arctanx,[
1,1];72arctan虫
2
4.
(1)
4;
(2)4;(3)
ln2;
习题9.4
1.cosx
2.
(1)
n
(
n0
2n
x
2n
1)nx
(2n)!
'
).
0(2n1)!
(lna)n
);
(2)ln2
n
x,
n!
(1)n1
);⑷1
n
x
n,
na
八门小1
1)22n
x
1)n1
2,2];
3.
(1)
(2n)!
4.
(1)
5.x
nxn1n(n1)
(右
02
0;e?
(x
2n1(
(1,1];⑹
arctan2
2n1x
右)(x
"\n
1),x
1)n,
3,1);
⑵佥
2n1
1(x1)n
1)n
);
11
[説.
(0,2];
八门_1.\2n
1)[丽以3)
f,
2n1
2(2n)!
n1(2n1)(n!
)2(評
(1,1);
(2)
x[1,1],
2n1-
],x
1)n(1
f(n)(0)
).
1
2
E(x
2)n,
(1,3).
0,
2[(2k)!
]22k(k!
)2'
n2k,
6.f(x)
7.
(1)
习题9.5
n1nx
n1(n
0.9848;
1)!
'
).
0.9461.
2.
(1)
f(x)
cos(4n3)x
4n3
cos(4n1)x]
4n1],
x(2k1),k0,1,2,川;
2,
⑵f(x)
[1
(1)n](ab)
cosnx
(1)n1(ab)sinnx},
x(2k1),k0,1,
II;
f(x)
f(x)
3.
(1)
f(x)
4.
5.
6.
1)n
2
n
cosnx.
f(x)
).
f(x)
f(x)
f(x)
f(x)
习题9.6
1.
(1)f(x)
⑵f(x)
f(x)
2.
(1)
f(x)
f(x)
f(x)
f(x)
5
(1)n
2(3cosnx
19n2
nsinnx)],x(2k
1)
n
4
(1)n1r
-cosnx,x[1
n14n2
1
(1)ne
1)
n3[1
n
];
cosnx[
n
(1)nne
(1)n]}sin
1n2
nx,x(0,
).
k0,1,2,川.
(1)n
n
]sinnx},
屮cosnx,
1n
[0,
].
1cosnhsinnx,xn
(0,h)
(h,);
l_
4
11
12
sinnh
cosnx,n
x[0,h)
(h,
).
l_
(1)n1
2nx
cos
l
12nx-sin—1n
1.
-SIn—2
);
xkT,k
T
(1)n1
-_-—cos2nx,x
0,
1,
2,|||;
).
sin
(£,1];
1
—cos—
l
-(ncos口
12
1)cosn-x
l
x[0,-)
()];
1
(1)1;
3‘Sinnx,n
[0,1];
2_
屮Icosn
n
x,
x[0,1].
2cos(2no(2n1)2
1)
x,x[1,1],
5.
6.
7.
f(x)
f(x)
f(x)
f(t)
总习题9
1.
2.
(1)C;
(1)8;
3.
4.
5.
csinnx小c
12,x(0,2
n1n
2
(1)
(1)n1.
-sinnx,
sin2nx,x1n
(1)n1.Sinn
n1n
(1)n1.Sinnx,
n1n
(1)niinx
e
nn
n0
2E
1.n-sin—1nI
);
x(0,);
(0,
);
x,
x(3,5)
nt
cos——
l
x(1,1).
(3,5).
2kl,k0,1,
2,111.
⑵C;⑵
⑶B;⑷A;
1,0P1,P
⑸A.
0;⑶R2;
2,2),
s(x)
2x
-1n(1-),x[2,0)(0,2),
x2(5)
1
x0;
(2)发散;⑶发散;⑷发散;⑸a1时收敛,0a1时发散;
1时收敛,a1时发散,a1且k1时收敛,a1且0绝对收敛;
收敛;
0a
(1)
(6)
(1)
1
k1时发散.
k-时收敛,k
2
(2)绝对收敛;(3)条件收敛;(4)条件收敛.
1
1时发散.
2
11
6.
(1)[打;
11
(-,-);
e
(2,0);(4)
(1,1).
7.
(1)41nF
41x
如etanx
1);
(2)s(x)
1
1(1-)ln(1x),
x
0,
1,
(1,0)(0,1],
x0,
x1;
(3)——
(2
1,
8.
(1)Tn
'14
3;
9.
(1)
z8n
(x
0
10.f(x)
习题10.1
(0x2);
⑵丝.
27
sin(2n1)x
1(2n1)3
(2)2;
(2)不是;
(4)(f
2
x
2、2
x)
百.
1);
(0
5x2n1
n02n1
1).
(3)1;
(3)不是;
(4)2,
(4)是,
4.
(1)y2(1y
(2)
2
xy2xy2y0,
5.
(1)x2
2y;
(2)
2xxe
6.2xyy
习题10.2
1.
(1)
(X
1)2
y2C;
(1x2)(1
y2)
Cx2
2.
(1)
3.
f(x)
4.
(1)
(4)
5.
(1)
6.
(1)
(4)
7.
(1)
8.
(1)
sin
(1
ycosxC
C(xa)(1
12ln(ex
x)y
In
cx
xe
2
xsin(—)
x
ay)
(6)
1)
2ln(e
1);
10x10y
y(x7X^1)
In
—arctanx
e4
xytan?
tan(x
C)
3
x
Ce^
sinx
C
x21
X]aeabe
csinx・
2esinx
y5(5x3Cx5)
(xC)e
x(lnInx
C)
Ce
2x2
!
X
2ex
xy
是,
(1
1
y2(1Ce和;
1cosx
(2)
(2)
(2)
x(x
e
C)
山x2
x21
C(1x
8
2)9;
4xy
是,
3x2(1
2lnx)
•x
2e
ycosxxcosy
10.
(1)x44xy2y2C;
x
(2)arctan(—)xCy
xarctan—
y
x
(4)—
y
11.约3.4秒,
13.
(1)
2
x
——In
2
C1XC2x
C4;
C1(x
x)C2;
C1xC2
(4)4(C1y
1)C12(x
C2)2
1.
(1)
相关;
(2)无关;
(3)无关;
(4)相关,
2.y
(C1
2
C2x)ex,
3.
(1)
y
Gx
C2e2x;
(2)y
C1e2x
C2(2x1)
5.y
C1(x2
'x)
C2(x21)1
6.
(1)
y
C1(1
(1)k(2k
1)!
!
2k
x
)C2(
(1)k(2k)!
!
k1(2k)!
!
k
0(2k1)!
!
2k
习题10.3
(2)
y
2k1、
x);
k
x
1(2k1)!
!
yGeosJaxC2sin^~"ax;
1时,yex(C1cos\/12xC2sinj12x);
xx/2
(7)yC1eC2eC3cosxC4sinx;cos"x
(8)
y
C1cosxC2sinx
C3;
(9)y
(C1
C2x)cosx(C3
C4X)sinx;
(10)
y
(C1C2X)ex(C3
C4x)e
2x
(11)
y
eax(C1C2xC3x2
J;
(12)y
(C1
C2x)exC3cosx
C4sinX;
8.
(1)
y
AX_3x
4e2e;
(2)y
(2x)e
x
2;
(3)y(4
c\X2
2x)e;
(4)
y
ex(cos3xsin3x)
;
(5)x
cost
1tsint
1
9.ycos3x-sin3x,
3
A2x,
12.
(1)
x12x
e-ex
2
(2)y
丄cos3xdosx;
248
13.
(1)
ex(xsinx);
(4)y
2xexsinx,
-(C11nxC2)
x
yC1C2lnxax;
x(C1lnxC2)
xln2X;
2
yx(C1lnxC2)C3x,
总习题10
1.
2
(3)二
y
2x3(2
33
InX)C;
(4)
1
~~2
y
2.
4.
6.
(5)y
f(X)yx1
XCyn或y
Cxn
(1)y
(G
Ge
7.(X)
GeX
8.yex
习题11.1
1.
(1)
Rez
Rez
Rez
Rez
2.X
1,y
Carctan_XC1;
3.
5.
(X)
X2
COSX
sinX
y2Cx
C2X)e2X
C2ex
C2e2X
1—e16
1c-
^Cos2X;
C1cosX
C2sinx企inx血
416
1
2
1x(二
22
(4)y
八2x
1)e,
C1cos(75lnx)C2sin(V5lnx)今sin(lnx),
1.-sinx
2
1|,Imz
I,Imz
7,Imz
1,Imz
11.
9.
1_
2,z
13,z
3,乏1
3.
(1)icos—isin—
22
—i
e2
(3)sin
icos—cos(
3
6.
(1)
(2)16a/316i;
约2.8秒.
32•IJ1A
n荷,W而,Argz
弓,忖^'Argz
13iJz^^'Argz
3i,|z|
arctan2
3
arcta^
2k
arctan"26
2k
(k
(kZ);
Z);
2k(kZ);
TTo,Argzarctan3
1cosisin
2k(k
Z).
7.1.
9.
(1)
(4)
2i
1i
⑶亦,瘡i,加;(4)d
2
—i
E)叫)e6;(4)
血cos7
1.
2i,
isin一)逅异.
4
Ta1i一-i.
22
以1
中心在2i,半径为1的圆周及其外部区域;
(2)双曲线xy1;(3)双曲线xy
为中心,半径为2的圆周;⑵直线X
10.
(1)直线y
3;
(4)不包含实轴的上半平面
1在第一象限中的一支;
(4)抛物线
习题11.2
1.
(1)W1
i,W2
22i,w38i;
(2)0argw
(3)直线v
⑷直线u
圆周uv
3.
4.
习题11.3