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A:A
B:B
C:C
D:D
<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
<img width="407" height="123" alt="" src="http://file.open.com.cn/ItemDB/20161030163648165.jpg" />
A:A
B:B
C:C
D:D
<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
<img width="349" height="113" alt="" src="http://file.open.com.cn/ItemDB/126522/99b2b4b4-3ec4-44ee-aa89-2f8319a6131f/20161030163015431.jpg" />
A:A
B:B
C:C
D:D
已知y=xsin3x ,则dy=( ).
A:(-cos3x+3sin3x)dx
B:(3xcos3x+sin3x)dx
C:(cos3x+3sin3x)dx
D:(xcos3x+sin3x)dx
<img width="592" height="120" alt="" src="http://file.open.com.cn/ItemDB/126522/f2f4d967-a8d0-4e3b-b080-247587568abd/20161030162926196.jpg" />
A:A
B:B
C:C
D:D
<img width="424" height="128" alt="" src="http://file.open.com.cn/ItemDB/126522/436f4346-fe25-413b-b9fa-017623c44e3d/20161030164037926.jpg" />
A:A
B:B
C:C
D:D
<img height="87" width="505" alt="" src="http://file.open.com.cn/ItemDB/126522/670d1d08-0cb9-4971-8210-983d968516a8/201512411427781.png" />
A:A
B:B
C:C
D:D
<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
曲线y=e^x-e^-x的凹区间是( )
A:(-∞,0)
B:(0,+∞)
C:(-∞,1)
D:(-∞,+∞)
<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
<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
<img width="402" height="79" alt="" src="http://file.open.com.cn/ItemDB/126522/49746b02-812c-40d8-8435-245dee2f47e1/2016103016279616.jpg" />
A:A
B:B
C:C
D:D
<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
<img height="115" width="390" alt="" src="http://file.open.com.cn/ItemDB/126522/ad7db776-5a8b-4195-bee4-d282aeb954e5/2015124114052165.png" />
A:A
B:B
C:C
D:D
<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
半径R为的金属圆片,则面积S的微分dS是( )
A:πRdR
B:2πRdR
C:πdR
D:2πdR
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.
<img width="406" height="77" alt="" src="http://file.open.com.cn/ItemDB/126522/52b3f912-6e1a-483f-b039-e464f74db2bd/20161030164144227.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" />
A:A
B:B
C:C
D:D
<img width="555" height="80" alt="" src="http://file.open.com.cn/ItemDB/126522/0f60758e-39f8-44dd-8c71-a78e4537303f/2016103016374347.jpg" />
A:A
B:B
C:C
D:D
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
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)
<img height="118" width="386" alt="" src="http://file.open.com.cn/ItemDB/126522/6df45cef-3246-4367-ba22-43df425d080f/2015124114129559.png" />
A:A
B:B
C:C
D:D
当x→0时,下列函数不是无穷小量的是 ( )
A:y=x
B:y=0
C:y=ln(x+1)
D:y=e^x
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
<img width="461" height="111" alt="" src="http://file.open.com.cn/ItemDB/126522/40ac15a0-f849-4bca-9759-3e66014b7724/2016103016294215.jpg" />
A:A
B:B
C:C
D:D
<img height="102" width="674" alt="" src="http://file.open.com.cn/ItemDB/126522/895e52db-c068-4c3c-a92d-6023e8f196b9/2015124113949513.png" />
A:A
B:B
C:C
D:D
<img height="86" width="633" alt="" src="http://file.open.com.cn/ItemDB/126522/23eeeb1e-276b-4b0e-8c1a-15eae84f0ce7/2015124114935436.png" />
A:A
B:B
C:C
D:D
<img width="442" height="85" alt="" src="http://file.open.com.cn/ItemDB/126522/1e1e1555-e29b-4935-99bd-85a5219c6f58/2016103016380519.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" />
A:A
B:B
C:C
D:D
若f(x)在处可导,则∣f(x)∣在x=x0处( )
A:可导
B:不可导
C:连续但未必可导
D:不连续
<img height="139" width="387" alt="" src="http://file.open.com.cn/ItemDB/126522/69a84db0-7fb3-4b52-9744-da261f4cea8b/2015124115259241.png" />
A:A
B:B
C:C
D:D
设函数y=f(x)在点x0处可导,且f′(x)>0, 曲线y=f(x)则在点(x0,f(x0))处的切线的倾斜角为{ }.
A:0
B:π/2
C:锐角
D:钝角
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 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
<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
<img height="142" width="537" alt="" src="http://file.open.com.cn/ItemDB/126522/d35ab703-68bb-4b41-9af9-9b5229db6f7e/201512411443880.png" />
A:A
B:B
C:C
D:D
<img height="101" width="464" alt="" src="http://file.open.com.cn/ItemDB/126522/cfa77ad6-b974-4f80-8bb4-8c15e070bb76/2015124115448757.png" />
A:A
B:B
C:C
D:D
y=e^(-x^2) 在区间(-∞,0)(1,∞)内分别是单调增加,单调增加
A:对
B:错
<img width="502" height="45" alt="" src="http://file.open.com.cn/ItemDB/126522/12ad1ce1-a6fe-4051-8ce7-499241be2fd8/2016103016521852.jpg" />
A:错误
B:正确
<img width="164" height="61" alt="" src="http://file.open.com.cn/ItemDB/126522/86d87af1-9eb0-49b0-a62f-ee6b05a9b06d/20161030165318306.jpg" />
A:错误
B:正确
y=ln[(1-x)/(1+x)]是奇函数.
A:对
B:错
函数在一点处极限存在的充要条件是函数在该点的左极限等于右极限。
A:对
B:错
极限存在,则一定唯一。
A:对
B:错
无穷间断点就是函数在该点的极限是无穷。
A:对
B:错
<img width="163" height="57" alt="" src="http://file.open.com.cn/ItemDB/126522/c040e271-cac1-4625-b031-238bd308b6ac/2016103016518493.jpg" />
A:错误
B:正确
<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
若函数f(x)在x0处连续,则f(x)在x0处极限存在.
A:对
B:错
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发表于 2020-8-8 19:08:06
