2014年成人高考专升本高等数学一真题及答案

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19

设球面方程为,则该球的球心坐标与半径分别为

  • A.(-1,2,-3);2
  • B.(-1,2,-3);4
  • C.(1,-2,3);2
  • D.(1,-2,3);4
20

设二元函数,则

  • A.1
  • B.2
  • C.<img src="//img1.yqda.net/question-name/6f/dbf68f1ebeb580f538e4befe56f620.png" width="50" height="24"/>
  • D.<img src="//img1.yqda.net/question-name/8b/bf48cf72176dc7e5ad5c04f3e4cea1.png" width="54" height="44"/>
21

  • A.-e
  • B.<img src="//img1.yqda.net/question-name/67/fb952143c203c7e5e4acc0e8c6f570.png" width="34" height="22"/>
  • C.<img src="//img1.yqda.net/question-name/3b/215e43b4342f5840b933d047f166e1.png" width="22" height="22"/>
  • D.e
22

设二元函数,则

  • A.2xy+siny
  • B.<img src="//img1.yqda.net/question-name/ff/3a74a46c0cddc9cbaf1006aeccc9c5.png" width="78" height="24"/>
  • C.2xy+xsiny
  • D.<img src="//img1.yqda.net/question-name/ea/3a35531bb847fe7e26fe1b51f20999.png" width="74" height="24"/>
23

  • A.-2
  • B.-1
  • C.1
  • D.2
24

  • A.<img src="//img1.yqda.net/question-name/46/820627731565960fadb0bdbf1f3986.png" width="75" height="42"/>
  • B.<img src="//img1.yqda.net/question-name/4a/88be67febd59891b08bb3b5df3adad.png" width="71" height="24"/>
  • C.<img src="//img1.yqda.net/question-name/37/8550282bf1cc95007b486e3c18d89b.png" width="62" height="42"/>
  • D.<img src="//img1.yqda.net/question-name/b8/710f7de323a6c6d77d3acb2d9c235c.png" width="56" height="24"/>
25

设函数f(x)在[a,b]连续,在(a,b)可导,f'(x)>0,若f(a)·f(b)<0,则y=f(x)在(a,b)

  • A.不存在零点
  • B.存在唯一零点
  • C.存在极大值点
  • D.存在极小值点
26

,则dy=

  • A.<img src="//img1.yqda.net/question-name/3d/206c4cde70702aad8546484c2b9125.png" width="63" height="22"/>
  • B.<img src="//img1.yqda.net/question-name/df/219bd01e9cee4b5be4e397e33a706a.png" width="56" height="22"/>
  • C.<img src="//img1.yqda.net/question-name/35/2697c1a7ac4e3517e953cdc72d8c1b.png" width="44" height="22"/>
  • D.<img src="//img1.yqda.net/question-name/0e/f22d2c522b3301516156255f810989.png" width="52" height="22"/>
27

设函数f(x)=xsinx,则

  • A.<img src="//img1.yqda.net/question-name/2f/b618ea95c57d3a1ae37803218ee035.png" width="16" height="42"/>
  • B.1
  • C.<img src="//img1.yqda.net/question-name/8b/6009d5837dfce935bcf2c9e50820d5.png" width="18" height="42"/>
  • D.2π
28

  • A.<img src="//img1.yqda.net/question-name/99/7b3f7de216332c775fc17fd5bdfc23.png" width="23" height="22"/>
  • B.<img src="//img1.yqda.net/question-name/51/3a4a64bb7353eb250669d7f175bbdd.png" width="22" height="22"/>
  • C.e
  • D.<img src="//img1.yqda.net/question-name/09/58c806f16034ea8c0aa40c4a78fe68.png" width="18" height="22"/>