西交《高等数学（专升本）》在线作业

adminhan

&nbsp;<img width="469" height="117" alt="" src="http://file.open.com.cn/ItemDB/126522/5bc0166c-81dc-427e-8424-61d5d8690cfa/20161030162830176.jpg" />
A:A
B:B
C:C
D:D

&nbsp;<img width="410" height="116" alt="" src="http://file.open.com.cn/ItemDB/126522/f92496cf-a152-49ad-9ae0-52ee138dba69/20161030164126724.jpg" />
A:A
B:B
C:C
D:D

曲线y=x/(x+2)的渐进线为(  )
A:x=-2
B:y=1
C:x=0
D:x=-2,y=1

设f(x)=2^x-1,则当x→0时,f(x)是x的(    )。
A:高阶无穷小
B:低阶无穷小
C:等价无穷小
D:同阶但不等价无穷

<img height="118" width="386" alt="" src="http://file.open.com.cn/ItemDB/126522/6df45cef-3246-4367-ba22-43df425d080f/2015124114129559.png" />&nbsp;
A:A
B:B
C:C
D:D

y=x/(x^2-1)的垂直渐近线有()条.
A:1
B:2
C:3
D:4

&nbsp;<img width="428" height="107" alt="" src="http://file.open.com.cn/ItemDB/126522/cb5387f5-80ca-46d9-beea-1f6b6eb4ff2f/20161030162654546.jpg" />
A:A
B:B
C:C
D:D

<img height="121" width="502" alt="" src="http://file.open.com.cn/ItemDB/126522/75849dc6-1f77-49f4-9ddc-dfe95f6e54e2/2015124115335435.png" />&nbsp;
A:A
B:B
C:C
D:D

&nbsp;<img width="429" height="128" alt="" src="http://file.open.com.cn/ItemDB/126522/468a9650-6d9e-4f24-9b49-5313eaec87dd/20161030163028379.jpg" />
A:A
B:B
C:C
D:D

以下结论正确的是(       ).
A:若x0为函数y=f(x)的驻点,则x0必为函数y=f(x)的极值点.
B:函数y=f(x)导数不存在的点,一定不是函数y=f(x)的极值点.
C:若函数y=f(x)在x0处取得极值,且f′(x)存在,则必有f′(x)=0.
D:若函数y=f(x)在x0处连续,则y=f′(x0)一定存在.

下列各微分式正确的是(    ).
A:xdx=d(x^2)
B:cos2x=d(sin2x)
C:dx=-d(5-x)
D:d(x^2)=(dx)^2

函数y=(x^2-1)^3的驻点个数为(  )
A:4
B:3
C:1
D:2

&nbsp;<img width="378" height="87" alt="" src="http://file.open.com.cn/ItemDB/126522/47e63f89-d561-4ca0-a348-33d2a3f93f57/20161030164251761.jpg" />
A:A
B:B
C:C
D:D

&nbsp;<img width="422" height="81" alt="" src="http://file.open.com.cn/ItemDB/126522/998268bd-6527-4b12-bd38-ff6e61d09c78/20161030164325614.jpg" />
A:A
B:B
C:C
D:D

M1(2,3,1)到点M2(2,7,4)的距离∣M1M2∣=(    ).
A:3
B:4
C:5
D:6

&nbsp;<img width="308" height="106" alt="" src="http://file.open.com.cn/ItemDB/126522/1d723046-31b0-4997-90b4-f663a918c772/20161030163931141.jpg" />
A:A
B:B
C:C
D:D

<img height="131" width="431" alt="" src="http://file.open.com.cn/ItemDB/126522/e132dfa9-ea6e-4a2b-96a2-6bbe02ee4f8f/2015124114721195.png" />&nbsp;
A:A
B:B
C:C
D:D

曲线y=xlnx的平行于直线x-y+1=0的切线方程是(    )
A:y=x
B:y=(lnx-1)(x-1)
C:y=x-1
D:y=-(x-1)

<img height="100" width="458" alt="" src="http://file.open.com.cn/ItemDB/126522/8452f6af-1830-41ce-b973-3f5739ac1423/2015124114534550.png" />&nbsp;
A:A
B:B
C:C
D:D

&nbsp;<img width="422" height="96" alt="" src="http://file.open.com.cn/ItemDB/126522/a2e196b5-427e-4b4a-b905-71884391a612/20161030163127832.jpg" />
A:A
B:B
C:C
D:D

<img height="133" width="472" alt="" src="http://file.open.com.cn/ItemDB/126522/f5be03b8-2506-4ef3-b6dd-4790b3c1beaa/201512411547977.png" />&nbsp;
A:A
B:B
C:C
D:D

&nbsp;<img width="478" height="84" alt="" src="http://file.open.com.cn/ItemDB/126522/de0741cb-3adf-42f1-bede-6df71c504fb1/20161030163727821.jpg" />
A:A
B:B
C:C
D:D

&nbsp;<img width="384" height="73" alt="" src="http://file.open.com.cn/ItemDB/126522/af271522-8b5b-41cb-8182-89a92e90c54f/20161030162757462.jpg" />
A:A
B:B
C:C
D:D

函数y=x^2*e^(-x)及图象在(1,2)内是(       ).
A:单调减少且是凸的
B:单调增加且是凸的
C:单调减少且是凹的
D:单调增加且是凹的

曲线 y=x^3+x-2 在点(1,0)处的切线方程是(    )
A:y=2(x-1)
B:y=4(x-1)
C:y=4x-1
D:y=3(x-1)

曲线y=2+lnx在点x=1处的切线方程是(   )
A:y=x-1
B:y=x+1
C:y=x
D:y=-x

&nbsp;<img width="357" height="122" alt="" src="http://file.open.com.cn/ItemDB/126522/d975cba9-2d53-446e-a1ea-cc519b21aa84/20161030162956679.jpg" />
A:A
B:B
C:C
D:D

<img height="86" width="394" alt="" src="http://file.open.com.cn/ItemDB/126522/f7e7aa52-7f6c-4251-bbcd-86ae93329689/201512411504204.png" />&nbsp;
A:A
B:B
C:C
D:D

<img height="114" width="440" alt="" src="http://file.open.com.cn/ItemDB/126522/f86cf892-c24d-45eb-a34b-d998557aeff6/2015124114242632.png" />&nbsp;
A:A
B:B
C:C
D:D

函数f(x)在点x0极限存在是函数在该点连续的(    )
A:必要条件
B:充分条件
C:充要条件
D:无关条件

&nbsp;<img width="405" height="133" alt="" src="http://file.open.com.cn/ItemDB/126522/37142beb-ba7c-4635-b0aa-60ac956a274b/20161030162528713.jpg" />
A:A
B:B
C:C
D:D

&nbsp;<img width="611" height="85" alt="" src="http://file.open.com.cn/ItemDB/126522/aa6e5b20-e849-4f30-8d6c-3b9dec10cc0f/20161030164344989.jpg" />
A:A
B:B
C:C
D:D

&nbsp;<img width="402" height="116" alt="" src="http://file.open.com.cn/ItemDB/126522/93feb885-33fb-40b8-8f69-5525954e43bc/2016103016299208.jpg" />
A:A
B:B
C:C
D:D

&nbsp;<img width="460" height="132" alt="" src="http://file.open.com.cn/ItemDB/126522/81003d7a-42f1-4fa2-9716-2c4ca477879f/20161030163112544.jpg" />
A:A
B:B
C:C
D:D

&nbsp;<img width="373" height="72" alt="" src="http://file.open.com.cn/ItemDB/126522/5a1859eb-8be3-41d3-ae58-42e5359920fa/20161030162726293.jpg" />
A:A
B:B
C:C
D:D

<img height="98" width="578" alt="" src="http://file.open.com.cn/ItemDB/126522/cc817db7-6621-4099-9f23-481fb75fd38a/2015124113030986.png" />&nbsp;
A:A
B:B
C:C
D:D

<img height="138" width="534" alt="" src="http://file.open.com.cn/ItemDB/126522/2d11d442-79dd-474b-bbce-602d5d7c5a4c/2015124113442854.png" />&nbsp;
A:A
B:B
C:C
D:D

&nbsp;<img width="519" height="81" alt="" src="http://file.open.com.cn/ItemDB/126522/e6a9e00d-1026-4ae0-a154-c38fb86a88a3/20161030163840175.jpg" />
A:A
B:B
C:C
D:D

&nbsp;<img width="293" height="115" alt="" src="http://file.open.com.cn/ItemDB/126522/6dde9773-9921-415e-979e-b505b70a35f1/2016103016398240.jpg" />
A:A
B:B
C:C
D:D

&nbsp;<img width="358" height="130" alt="" src="http://file.open.com.cn/ItemDB/126522/e0e39983-5a14-4d16-808c-316b61afc1ba/20161030163854512.jpg" />
A:A
B:B
C:C
D:D

&nbsp;<img width="263" height="41" alt="" src="http://file.open.com.cn/ItemDB/126522/bac71c7d-6307-42b9-abd1-faa1131afde5/20161030165234125.jpg" />
A:错误
B:正确

f〞(x)=0对应的点不一定是曲线的拐点
A:对
B:错

&nbsp;<img width="453" height="42" alt="" src="http://file.open.com.cn/ItemDB/126522/86d87af1-9eb0-49b0-a62f-ee6b05a9b06d/2016103016534530.jpg" />
A:错误
B:正确

函数在一点的导数就是在一点的微分.
A:对
B:错

极限存在,则一定唯一。
A:对
B:错

已知曲线y=f(x)在x=2处的切线的倾斜角为5/6∏,则f′(2)=-1
A:对
B:错

&nbsp;<img width="378" height="56" alt="" src="http://file.open.com.cn/ItemDB/2016103016512323.jpg" />
A:错误
B:正确

y=ln[(1-x)/(1+x)]是奇函数.
A:对
B:错

&nbsp;<img width="280" height="47" alt="" src="http://file.open.com.cn/ItemDB/126522/c7cdd45c-1561-4cac-9128-bb8435d86025/20161030165249510.jpg" />
A:错误
B:正确

任何函数都可以求出定积分。
A:对
B:错