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函数 http://picflow.koolearn.com/upload/papers/20140823/20140823162309966858.gif的图像恒过定点A,若点A在直线mx+ny+1=0上,且满足mn>0,则 http://picflow.koolearn.com/upload/papers/20140823/20140823162309982456.gif的最小值为( )

发布时间:2021-07-21

A.8

B.9

C.http://picflow.koolearn.com/upload/papers/20140823/20140823162309998264.gif

D.3

试卷相关题目

  • 1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

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  • 2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)

    开始考试点击查看答案
  • 3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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  • 4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

    开始考试点击查看答案
  • 5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

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  • 6下列各组中,指数式与对数式的互换不正确的为(   )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823162525968617.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823162525999625.gif

    C.b2 = a(b>0,且b≠1)与loga b =" 2"

    D.e0=1与In1=0

    开始考试点击查看答案
  • 7已知 http://picflow.koolearn.com/upload/papers/20140823/20140823161429737482.gif,则 http://picflow.koolearn.com/upload/papers/20140823/20140823161429752670.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823161429768667.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823161429784644.gif的大小关系为(   )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823161429799277.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823161429815283.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823161429830283.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823161429862278.gif

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  • 8已知 http://picflow.koolearn.com/upload/papers/20140823/20140823160853431550.gif在[0,1]上是 x的减函数,则 a的取值范围是(   )

    A.(0,1)

    B.(0,2)

    C.(1,2)

    D.[2,+∞)

    开始考试点击查看答案
  • 9函数y = http://picflow.koolearn.com/upload/papers/20140823/20140823160835133507.gif的图象(       )

    A.关于原点对称

    B.关于直线y = -x对称

    C.关于y轴对称

    D.关于直线y = x对称

    开始考试点击查看答案
  • 10http://picflow.koolearn.com/upload/papers/20140823/20140823161058840575.gif中,实数 http://picflow.koolearn.com/upload/papers/20140823/20140823161058871192.gifhttp://picflow.koolearn.com/upload/papers/20140823/2014082316105888785.gif的取值范围是(  )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823161058918374.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823161058934573.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823161058965273.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/2014082316105898085.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823161058996384.gif

    开始考试点击查看答案
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