最新试题库含答案高等数学基础形成性考核册答案.docx
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最新试题库含答案高等数学基础形成性考核册答案
2016年7月高等数学基础形成性考核册答案
:
篇一:
高等数学基础形成性考核册及答案
高等数学基础第一次作业
第1章函数
第2章极限与连续
(一)单项选择题
⒈下列各函数对中,(C)中的两个函数相等.
2A.f(x)?
(x),g(x)?
xB.f(x)?
x2,g(x)?
x
x2?
1C.f(x)?
lnx,g(x)?
3lnxD.f(x)?
x?
1,g(x)?
x?
1
⒉设函数f(x)的定义域为(?
?
?
?
),则函数f(x)?
f(?
x)的图形关于(C)对称.3
A.坐标原点B.x轴
C.y轴D.y?
x
⒊下列函数中为奇函数是(B).
A.y?
ln(1?
x)B.y?
xcosx2
ax?
a?
x
C.y?
D.y?
ln(1?
x)2
⒋下列函数中为基本初等函数是(C).
A.y?
x?
1B.y?
?
x
C.y?
x2D.y?
?
?
?
1,x?
01,x?
0?
⒌下列极限存计算不正确的是(D).
x2
?
1B.limln(1?
x)?
0A.lim2x?
0x?
?
x?
2
sinx1C.lim?
0D.limxsin?
0x?
?
x?
?
xx
⒍当x?
0时,变量(C)是无穷小量.
1sinxA.B.xx
1C.xsinD.ln(x?
2)x
⒎若函数f(x)在点x0满足(A),则f(x)在点x0连续。
A.limf(x)?
f(x0)B.f(x)在点x0的某个邻域内有定义x?
x0
C.lim?
f(x)?
f(x0)D.lim?
f(x)?
lim?
f(x)x?
x0x?
x0x?
x0
(二)填空题
x2?
9?
ln(1?
x)的定义域是.⒈函数f(x)?
x?
322⒉已知函数f(x?
1)?
x?
x,则f(x)?
1x1/2⒊lim(1?
.)?
x?
?
2x
1?
x?
⒋若函数f(x)?
?
(1?
x),x?
0,在x?
0处连续,则k?
e.
?
x?
0?
x?
k,
?
x?
1,x?
0⒌函数y?
?
的间断点是.?
sinx,x?
0
⒍若limf(x)?
A,则当x?
x0时,f(x)?
A称为.x?
x0
(三)计算题
⒈设函数
?
ex,f(x)?
?
?
x,
⒉求函数y?
lglgx?
0x?
0求:
f(?
2),f(0),f
(1).解:
f(-2)=-2,f(0)=0,f
(1)=e2x?
1的定义域.x
2x?
1解:
由?
0解得x0或x1/2,函数定义域为(-∞,0)∪(1/2,+∞)x
⒊在半径为R的半圆内内接一梯形,
试将梯形的面积表示成其高的函数.解:
如图梯形面积A=(R+b)h,其中b?
22∴R2?
h2A?
(R?
R?
h)h
sin3x3sin3x?
3lim?
lim⒋求x?
0sin2xx?
02sin2x22xx2?
1x?
1lim?
lim(x?
1)?
?
2x?
?
1sin(x?
1)x?
?
1sin(x?
1)
⒌求
⒍求
⒎求.
⒏求
⒐求tan3xsin3xlim?
lim3cos3x?
3x?
0x?
0x3x?
x2?
1(?
x2?
1)(?
x2?
1)lim?
limx?
0x?
0sinx(?
x2?
1)sinxx?
lim?
lim?
022x?
0x?
0(?
x?
1)sinx?
x?
1sinxx?
1xx?
3?
4x?
4xlim()?
lim()?
lim(1?
)x?
?
x?
3x?
?
x?
?
x?
3x?
3x?
3(1?
x2)?
1x?
4?
4?
4[(1?
)]2x?
6x?
8(x?
2)(x?
4)2?
e?
4limlim?
x?
4x2?
5x?
4x?
x?
4(x?
1)(x?
?
4)33(1?
)⒑设函数x?
3?
(x?
2)2,x?
1?
f(x)?
?
x,?
1?
x?
1讨论f(x)的连续性,并写出其连续区间.
?
x?
1,x?
?
1?
x?
1解:
x?
1lim?
f(x)?
(1?
2)2?
1?
lim?
f(x)?
1
limf(x)?
1?
f
(1)x?
1limf(x)?
?
1?
limf(x)?
?
1?
1?
0x?
?
1?
x?
?
1?
∴函数在x=1处连续
x?
?
1limf(x)
不存在,∴函数在x=-1处不连续高等数学基础第二次作业
第3章导数与微分
(一)单项选择题
f(x)f(x)存在,则lim?
(B).x?
0x?
0xx
A.f(0)B.f?
(0)
C.f?
(x)D.0
f(x0?
2h)?
f(x0)⒉设f(x)在x0可导,则lim?
(D).h?
02h
A.?
2f?
(x0)B.f?
(x0)
C.2f?
(x0)D.?
f?
(x0)⒈设f(0)?
0且极限lim
f(1?
?
x)?
f
(1)?
(A).?
x?
0?
x
A.eB.2e
11C.eD.e24
⒋设f(x)?
x(x?
1)(x?
2)?
(x?
99),则f?
(0)?
(D).⒊设f(x)?
e,则limx
A.99B.?
99
C.99!
D.?
99!
⒌下列结论中正确的是(C).
A.若f(x)在点x0有极限,则在点x0可导.
B.若f(x)在点x0连续,则在点x0可导.
C.若f(x)在点x0可导,则在点x0有极限.
D.若f(x)在点x0有极限,则在点x0连续.
(二)填空题
1?
2?
xsin,x?
0⒈设函数f(x)?
?
,则f?
(0)?
x?
x?
0?
0,
df(lnx)x2xx?
.⒉设f(e)?
e?
5e,则dx
x?
1在(1,2)处的切线斜率是.
π⒋曲线f(x)?
sinx在(,1)处的切线方程是.42x2x⒌设y?
x,则y?
?
⒊曲线f(x)?
⒍设y?
xlnx,则y?
?
?
.
(三)计算题
⒈求下列函数的导数y?
:
⑴y?
(xx?
3)exy=(x3/2+3)ex,y'=3/2x1/2ex+(x3/2+3)ex
=(3/2x1/2+x3/2+3)ex
⑵y?
cotx?
x2lnxy'=-csc2x+2xlnx+xx2⑶y?
y'=(2xlnx-x)/ln2xlnx
cosx?
2xx32x6⑷y?
y'=[(-sinx+2ln2)x-3x(cosx+2)]/xx3
⑸y?
lnx?
x=sinx2
⑹y?
x4?
sinxlnxy'=4x3-cosxlnx-sinx/x1(?
2x)sinx?
(lnx?
x2)cosxsin2x
sinx?
x2x2x2x⑺y?
y'=[(cosx+2x)3-(sinx+x)3ln3]/33x
=[cosx+2x-(sinx+x2)ln3]/3x
⑻y?
extanx?
lnxy'=extanx+exsec2x+1/x=ex(tanx+sec2x)+1/x⒉求下列函数的导数y?
:
⑴y?
e?
x
⑵y?
lncosx32
⑶y?
xxxy=x7/8y'=(7/8)x-1/8⑷y?
x?
x
⑸y?
cos2ex
⑹y?
cosex
⑺y?
sinnxcosnxy'=nsinn-1xcosxcosnx-nsinnxsinnx⑻y?
5sinx
⑼y?
esinx
⑽y?
xx?
ex
⑾y?
xe?
ee
⒊在下列方程中,y?
y(x)是由方程确定的函数,求y?
:
⑴ycosx?
e2y方程对x求导:
y'cosx-ysinx=2y'e2y22222xx
y'=ysinx/(cosx-2e2y)
⑵y?
cosylnx方程对x求导:
y'=y'(-siny)lnx+(1/x)cosy
y'=[(1/x)cosy]/(1+sinylnx)x2⑶2xsiny?
方程对x求导:
2siny+y'2xcosy=(2xy-x2y')/y2y
y'=2(xy–y2siny)/(x2+2xy2cosy)
⑷y?
x?
lny方程对x求导:
y'=1+y'/y,y'=y/(y-1)⑸lnx?
ey?
y2方程对x求导:
1/x+y'ey=2yy',y'=1/x(2y-ey)
⑹y2?
1?
exsiny方程对x求导:
2yy'=exsiny+y'excosy
y'=exsiny/(2y-excosy)
⑺ey?
ex?
y3方程对x求导:
y'ey=ex-3y2y',y'=ex/ey+3y2⑻y?
5x?
2y方程对x求导:
y'=5xln5+y'2yln2,y'=5xln5/(1-2yln2)⒋求下列函数的微分dy:
⑴y?
cotx?
cscxlnxsinx
1?
x⑶y?
arcsin1?
x
1?
x⑷y?
1?
x
⑸y?
sin2ex⑵y?
⑹y?
tanex
⒌求下列函数的二阶导数:
⑴y?
xlnx
⑵y?
xsinx
⑶y?
arctanx
⑷y?
3x
(四)证明题
设f(x)是可导的奇函数,试证f?
(x)是偶函数.
证明:
由f(x)=-f(-x)求导f'(x)=-f'(-x)(-x)'f'(x)=f'(-x),∴f'(x)是偶函数
23
篇二:
高等数学基础形成性考核册答案
篇三:
2014年秋电大高等数学基础形成性考核册答案
高等数学基础作业1
第1章函数
第2章极限与连续
(一)单项选择题
⒈下列各函数对中,(C)中的两个函数相等.
A.f(x)?
(x)2,g(x)?
xB.f(x)?
x2,g(x)?
x
x2?
13C.f(x)?
lnx,g(x)?
3lnxD.f(x)?
x?
1,g(x)?
x?
1
⒉设函数f(x)的定义域为(?
?
?
?
),则函数f(x)?
f(?
x)的图形关于(C)对称.
A.坐标原点B.x轴
C.y轴D.y?
x
⒊下列函数中为奇函数是(B).
A.y?
ln(1?
x2)B.y?
xcosx
ax?
a?
x
1?
x)C.y?
D.y?
ln(2
⒋下列函数中为基本初等函数是(C).
A.y?
x?
1B.y?
?
x
C.y?
x2?
?
1,x?
0D.y?
?
1,x?
0?
⒌下列极限存计算不正确的是(D).
x2
?
1B.limln(1?
x)?
0A.lim2x?
0x?
?
x?
2
sinx1?
0D.limxsin?
0C.limx?
?
x?
?
xx
⒍当x?
0时,变量(C)是无穷小量.
sinx1A.B.xx
1C.xsinD.ln(x?
2)x
⒎若函数f(x)在点x0满足(A),则f(x)在点x0连续。
A.limf(x)?
f(x0)B.f(x)在点x0的某个邻域内有定义x?
x0
f(x)?
f(x0)D.limf(x)?
limf(x)C.lim?
?
?
x?
x0x?
x0x?
x0
(二)填空题x2?
9⒈函数f(x)?
?
ln(1?
x)的定义域是?
x|x?
3?
x?
322⒉已知函数f(x?
1)?
x?
x,则f(x)?
1x)?
.⒊lim(1?
x?
?
2x
11x12x?
1
lim(1?
)?
lim(1?
)2?
e2x?
?
x?
?
2x2x
1?
x?
⒋若函数f(x)?
?
(1?
x),x?
0,在x?
0处连续,则k?
e.
?
x?
0?
x?
k,
?
x?
1,x?
0⒌函数y?
?
的间断点是x?
0sinx,x?
0?
⒍若limf(x)?
A,则当x?
x0时,f(x)?
A称为x?
x0时的无穷小量.x?
x0
(二)计算题
⒈设函数
?
ex,x?
0f(x)?
?
?
x,x?
0
求:
f(?
2),f(0),f
(1).
解:
f?
?
2?
?
?
2,f?
0?
?
0,f?
1?
?
e?
e1
2x?
1的定义域.x
?
2x?
1?
?
x?
0?
?
2x?
11?
解:
y?
lg有意义,要求?
解得?
x?
或x?
0x2?
x?
0?
?
?
?
x?
0?
1?
?
则定义域为?
x|x?
0或x?
?
2?
?
⒊在半径为R的半圆内内接一梯形,梯形的一个底边与半圆的直径重合,另一底边的两个端⒉求函数y?
lg点在半圆上,试将梯形的面积表示成其高的函数.
解:
A
Oh
B
C
设梯形ABCD即为题中要求的梯形,设高为h,即OE=h,下底CD=2R
直角三角形AOE中,利用勾股定理得
AE?
则上底=2AE?
h2R?
?
hR?
2
sin3x⒋求lim.x?
0sin2x故S?
?
?
sin3xsin3x?
3xsin3x3133解:
lim?
lim?
lim?
=?
?
x?
0sin2xx?
0x?
02122?
2x2x2x
x2?
1⒌求lim.x?
?
1sin(x?
1)
x2?
1(x?
1)(x?
1)x?
1?
1?
1?
lim?
lim?
?
?
2解:
limx?
?
1sin(x?
1)x?
?
1sin(x?
1)x?
?
11
x?
1
tan3x⒍求lim.x?
0x
tan3xsin3x1sin3x11?
lim?
lim?
?
3?
1?
?
3?
3
解:
limx?
0x?
0xxcos3xx?
03xcos3x1
?
x2?
1
⒎求lim.x?
012
?
?
解:
limx?
0x?
0x?
0sinx
?
limx?
0x1)x?
0?
01?
1?
1⒏求lim(x?
?
x?
1x).x?
3
111(1?
)x[(1?
)?
x]?
1x?
1xe?
1
x?
4解:
lim()?
lim()?
lim?
lim?
?
ex3x?
?
x?
3x?
?
x?
?
xx?
?
e11?
(1?
)[(1?
)3]3
xx3
x2?
6x?
8⒐求lim2.x?
4x?
5x?
4
x2?
6x?
8?
x?
4?
?
x?
2?
?
limx?
2?
4?
2?
2解:
lim2?
limx?
4x?
5x?
4x?
4x?
4x?
1x?
4x?
14?
131?
⒑设函数
?
(x?
2)2,x?
1?
f(x)?
?
x,?
1?
x?
1
?
x?
1,x?
?
1?
讨论f(x)的连续性,并写出其连续区间.
解:
分别对分段点x?
?
1,x?
1处讨论连续性
(1)
x?
?
1?
x?
?
1?
limf?
x?
?
limx?
?
1x?
?
1?
x?
?
1?
limf?
x?
?
lim?
x?
1?
?
?
1?
1?
0
所以limf?
x?
?
limf?
x?
,即f?
x?
在x?
?
1处不连续x?
?
1?
x?
?
1?
(2)
x?
1?
x?
1?
limf?
x?
?
lim?
x?
2?
?
?
1?
2?
?
1x?
1?
x?
1?
22limf?
x?
?
limx?
1
f?
1?
?
1
所以limf?
x?
?
limf?
x?
?
f?
1?
即f?
x?
在x?
1处连续x?
1?
x?
1?
由
(1)
(2)得f?
x?
在除点x?
?
1外均连续
故f?
x?
的连续区间为?
?
?
?
1?
第3章导数与微分
(一)单项选择题?
?
1,?
?
?
《高等数学基础》第二次作业
f(x)f(x)?
(C).存在,则limx?
0x?
0xx
A.f(0)B.f?
(0)
C.f?
(x)D.0cvx
f(x0?
2h)?
f(x0)?
(D).⒉设f(x)在x0可导,则limh?
02h
A.?
2f?
(x0)B.f?
(x0)
C.2f?
(x0)D.?
f?
(x0)⒈设f(0)?
0且极限lim
f(1?
?
x)?
f
(1)?
(A).?
x?
0?
x
A.eB.2e
11C.eD.e24
⒋设f(x)?
x(x?
1)(x?
2)?
(x?
99),则f?
(0)?
(D).⒊设f(x)?
ex,则lim
A.99B.?
99
C.99!
D.?
99!
⒌下列结论中正确的是(C).
A.若f(x)在点x0有极限,则在点x0可导.
B.若f(x)在点x0连续,则在点x0可导.
C.若f(x)在点x0可导,则在点x0有极限.
D.若f(x)在点x0有极限,则在点x0连续.
(二)填空题
1?
2?
xsin,x?
0⒈设函数f(x)?
?
,则f?
(0)?
x?
x?
0?
0,
df(lnx)2lnx5.?
?
xxdx
1⒊曲线f(x)?
x?
1在(1,2)处的切线斜率是k?
2
π22?
⒋曲线f(x)?
sinx在(,1)处的切线方程是y?
x?
(1?
)4224
⒌设y?
x2x,则y?
?
2x2x(1?
lnx)
1⒍设y?
xlnx,则y?
?
?
x⒉设f(ex)?
e2x?
5ex,则
(三)计算题
⒈求下列函数的导数y?
:
3x⑴y?
(xx?
3)ey?
?
(x?
3)e?
x2e2
⑵y?
cotx?
x2lnxy?
?
?
csc2x?
x?
2xlnxxx321
2xlnx?
xx2
⑶y?
y?
?
2lnxlnx
cosx?
2xx(?
sinx?
2xln2)?
3(coxs?
2x)⑷y?
y?
?
3xx4
1sinx(?
2x)?
(lnx?
x2)cosx2lnx?
x⑸y?
y?
?
2sinxsinx
sinx3?
cosxlnx⑹y?
x4?
sinxlnxy?
?
4x?
x
sinx?
x23x(cosx?
2x)?
(sinx?
x2)3xln3⑺y?
y?
?
32x3x
ex1xxx?
?
⑻y?
etanx?
lnxy?
?
etan2cosxx
⒉求下列函数的导数y?
:
⑴y?
e1?
x2
?
x
⑵y?
lncosx3y?
?
e?
x2x2
?
sinx3
223y?
?
3x?
?
3xtanx3cosx
⑶y?
7
8xxx?
17y?
xy?
?
x88⑷y?
x?
x
1?
2?
111y?
?
(x?
x2)3(1?
x2)32
2x⑸y?
cose