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半径为3,中心角为120 o的扇形面积为(   )

发布时间:2021-07-21

A.http://picflow.koolearn.com/upload/papers/20140824/20140824055804758428.png

B.http://picflow.koolearn.com/upload/papers/20140824/20140824055804774392.png

C.http://picflow.koolearn.com/upload/papers/20140824/20140824055804789392.png

D.http://picflow.koolearn.com/upload/papers/20140824/20140824055804820439.png

试卷相关题目

  • 1已知幂函数http://picflow.koolearn.com/upload/papers/g02/20110408/20110408090838296961.gif的图象经过点(4,2),则f(16)=

    A.2http://picflow.koolearn.com/upload/papers/g02/20110408/20110408090838296882.gif

    B.4

    C.4http://picflow.koolearn.com/upload/papers/g02/20110408/20110408090838312882.gif

    D.8

    开始考试点击查看答案
  • 2下列函数是幂函数的是

    A.y=2x  

    B.y=x-3  

    C.y=2x2  

    D.y=x2+1

    开始考试点击查看答案
  • 3http://picflow.koolearn.com/upload/papers/g02/20110629/201106291544210581292.gif,则下列关系式正确的是

    A.T1<T2<T3

    B.T3<T1<T2

    C.T2<T3<T1

    D.T2<T1<T3

    开始考试点击查看答案
  • 4如图所示的曲线是幂函数y=xα在第一象限的图象,已知α∈{-4,-http://picflow.koolearn.com/upload/papers/g02/20110818/20110818092838515880.gifhttp://picflow.koolearn.com/upload/papers/g02/20110818/20110818092838562880.gif,4}相应于曲线C1,C2,C3,C4的α值依次为http://picflow.koolearn.com/upload/papers/g02/20110818/201108180928386401709.gif

    A.-4,-http://picflow.koolearn.com/upload/papers/g02/20110818/20110818092838656880.gifhttp://picflow.koolearn.com/upload/papers/g02/20110818/20110818092838656880.gif,4

    B.4,http://picflow.koolearn.com/upload/papers/g02/20110818/20110818092838671880.gif,-http://picflow.koolearn.com/upload/papers/g02/20110818/20110818092838687880.gif,-4

    C.-http://picflow.koolearn.com/upload/papers/g02/20110818/20110818092838687880.gif,-4,4,http://picflow.koolearn.com/upload/papers/g02/20110818/20110818092838796880.gif

    D.4,http://picflow.koolearn.com/upload/papers/g02/20110818/20110818092838812880.gif,-4,-http://picflow.koolearn.com/upload/papers/g02/20110818/20110818092838906880.gif

    开始考试点击查看答案
  • 5图中曲线是幂函数y=xn在第一象限的图象,已知n取±2,±http://picflow.koolearn.com/upload/papers/g02/20110629/20110629145150339879.gif四个值,则相应于曲线C1,C2,C3,C4的n依次为http://picflow.koolearn.com/upload/papers/g02/20110629/201106291451503701644.gif

    A.-2,http://picflow.koolearn.com/upload/papers/g02/20110629/20110629145150386897.gifhttp://picflow.koolearn.com/upload/papers/g02/20110629/20110629145150386879.gif,2

    B.2,http://picflow.koolearn.com/upload/papers/g02/20110629/20110629145150402879.gifhttp://picflow.koolearn.com/upload/papers/g02/20110629/20110629145150417897.gif,-2

    C.http://picflow.koolearn.com/upload/papers/g02/20110629/20110629145150417897.gif,-2,2,http://picflow.koolearn.com/upload/papers/g02/20110629/20110629145150433879.gif

    D.2,http://picflow.koolearn.com/upload/papers/g02/20110629/20110629145150433879.gif,-2,http://picflow.koolearn.com/upload/papers/g02/20110629/20110629145150448897.gif

    开始考试点击查看答案
  • 6已知点P( http://picflow.koolearn.com/upload/papers/20140824/20140824055628116571.png)在第三象限,则角 http://picflow.koolearn.com/upload/papers/20140824/20140824055628147310.png

    A.第一象限

    B.第二象限

    C.第三象限

    D.第四象限

    开始考试点击查看答案
  • 7若函数f(x)=kax-a-x(a>0且a≠1)在(-∞,+∞)上的单调递增的奇函数,则g(x)=loga(x+k)的图象是(  )

    A. 魔方格

    B. 魔方格

    C. 魔方格

    D. 魔方格

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  • 8对于任意实数x,符号[x]表示x的整数部分,即[x]是不超过x的最大整数,例如[2]=2;[2.1]=2;[-2.2]=-3,这个函数[x]叫做“取整函数”,它在数学本身和生产实践中有广泛的应用,那么[log31]+[log32]+[log33]+…+[log3243]的值为(  )

    A.847

    B.850

    C.852

    D.857

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  • 9函数f(x)=lnx的图象经过一个定点是(  )

    A.(1,0)

    B.(0,1)

    C.(2,0)

    D.(-1,0)

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  • 10函数 http://picflow.koolearn.com/upload/papers/20140823/20140823162055167620.gif的定义域是(  )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823162055354416.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823162055369516.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823162055479446.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823162055494470.gif

    开始考试点击查看答案
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