2012年成人高考《数学(文史财经类)》预测试卷(三)

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9

,则a的取值范围是(  )

  • A.0或a>1       
  • B.<img alt="" src="//img1.yqda.net/question-name/c7/b0d2181c63745aff8b04a10208521d.gif" />C.a>1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  • D.0
16

已知角α=-31π/3,则a的终边在(  )

  • A.第一象限&nbsp;
  • B.第二象限
  • C.第三象限&nbsp;
  • D.第四象限&nbsp;
17

[0810]不等式|x-2 |≤3的解集是(  )

  • A.{x|x≤-5或z≥1)
  • B.{x|-5≤z≤1)
  • C.{x| x≤-1或x≥5)
  • D.{x|-1≤x≤5}
19

已知f(x)=1+,则f()= (  )

  • A.<img src="//img1.yqda.net/question-name/d1/167080dd9e484742dc50333ae995b4.gif" alt="" />
  • B.3
  • C.2
  • D.1
21

已知圆的半径为R,弧长为的弧所对的圆心角等于(  )

  • A.<img alt="" src="//img1.yqda.net/question-name/94/3d8c5d693a5571f338695f881ac312.gif" />
  • B.<img alt="" src="//img1.yqda.net/question-name/a3/bd738df6695f75f31312265b1cd5d5.gif" />&nbsp;
  • C.1200&nbsp;
  • D.<img alt="" src="//img1.yqda.net/question-name/16/9c2ec16e4e6523f36391a6b8c07d18.gif" />
22

已知sinα=,则sin(α+)的值等于(  )

  • A.<img alt="" src="//img1.yqda.net/question-name/ab/2eaf71f311ca999dce9877f4078204.gif" />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  • B.<img alt="" src="//img1.yqda.net/question-name/dd/5c982d7fb7453a40f255205c2eb0a8.gif" />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  • C.<img alt="" src="//img1.yqda.net/question-name/1c/0ce1a0033f48ea7956575cae076f21.gif" />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  • D.<img alt="" src="//img1.yqda.net/question-name/9f/e9c6dba4b35c19ed2afab98692b2ad.gif" />
24

设COSα=-14且sinα<0,则cotα的值等于(  )

  • A.<img src="//img1.yqda.net/question-name/14/50172b03e9f5500f60aba974fbb17c.gif" alt="" />&nbsp;&nbsp;
  • B.-<img src="//img1.yqda.net/question-name/49/55714d0e4960b81fc19872dc7aec80.gif" alt="" />&nbsp;&nbsp;&nbsp;
  • C.<img src="//img1.yqda.net/question-name/b9/0f33d04479bcfe9fbacc9223a94825.gif" alt="" />&nbsp;
  • D.-<img src="//img1.yqda.net/question-name/ee/abd31c6515e7f6d46a20f7d1022450.gif" alt="" />&nbsp;