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函数在区间上有最小值,则实数的取值范围是(   )

发布时间:2021-07-16

A.http://picflow.koolearn.com/upload/papers/20140823/20140823163946855363.png

B.http://picflow.koolearn.com/upload/papers/20140823/20140823163946871379.png

C.http://picflow.koolearn.com/upload/papers/20140823/20140823163946886336.png

D.http://picflow.koolearn.com/upload/papers/20140823/20140823163946902342.png

试卷相关题目

  • 1定义在 http://picflow.koolearn.com/upload/papers/20140823/20140823164636059310.png上的函数 http://picflow.koolearn.com/upload/papers/20140823/20140823164636106464.png满足 http://picflow.koolearn.com/upload/papers/20140823/20140823164636122495.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823164636137474.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823164636106464.png的导函数,已知 http://picflow.koolearn.com/upload/papers/20140823/20140823164636200592.png的图像如图所示,若两个正数 http://picflow.koolearn.com/upload/papers/20140823/20140823164636215287.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823164636231308.png满足 http://picflow.koolearn.com/upload/papers/20140823/20140823164636309679.png,则 http://picflow.koolearn.com/upload/papers/20140823/20140823164636340581.png的取值范围是(    )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823164636512583.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823164636715886.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823164636730565.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823164636746539.png http://picflow.koolearn.com/upload/papers/20140823/201408231646367771919.png

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  • 2已知函数 y= f( x)( x∈R)的图象如图所示,则不等式 xf′( x)<0的解集为(  ) http://picflow.koolearn.com/upload/papers/20140823/201408231659559987014.jpg

    A.(-∞,)∪(,2)

    B.(-∞,)∪(2,+∞)

    C.(-1,0)∪(1,3)

    D.(-∞,0)∪(,2)

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  • 3曲线 http://picflow.koolearn.com/upload/papers/20140823/20140823164559945826.png在点(0,1)处的切线与直线 http://picflow.koolearn.com/upload/papers/20140823/20140823164559976631.png垂直,则 http://picflow.koolearn.com/upload/papers/20140823/20140823164559992301.png(    )   

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823164600023330.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823164600070343.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823164600288359.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823164600304373.png

    开始考试点击查看答案
  • 4如果函数 http://picflow.koolearn.com/upload/papers/20140823/20140823165956622544.gif满足:对于任意的 http://picflow.koolearn.com/upload/papers/20140823/20140823165956637511.gif,都有 http://picflow.koolearn.com/upload/papers/20140823/20140823165956653639.gif恒成立,则 http://picflow.koolearn.com/upload/papers/20140823/20140823165956668192.gif的取 http://picflow.koolearn.com/upload/papers/20140823/2014082316595674672.gif值范围是(  )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823165956778493.gif http://picflow.koolearn.com/upload/papers/20140823/2014082316595679372.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823165956809644.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823165956824893.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823165956856903.gif

    开始考试点击查看答案
  • 5函数 http://picflow.koolearn.com/upload/papers/20140823/20140823163147045459.gif,若0<a<b,则f(ea)与f(eb)的大小关系是(    )

    A.f(ea)>f(eb)

    B.f(ea)

    C.f(ea)="f(eb)"

    D.无法确定

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  • 6若函数 http://picflow.koolearn.com/upload/papers/20140823/20140823163409255798.gifhttp://picflow.koolearn.com/upload/papers/20140823/2014082316340925572.gif导函数 http://picflow.koolearn.com/upload/papers/20140823/20140823163409270412.gif在区间(-∞,4] 上是减函数,则实数 http://picflow.koolearn.com/upload/papers/20140823/20140823163409286192.gif的取值范围是(    )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823163409302407.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823163409317404.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823163409333418.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823163409364409.gif

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  • 7已知函数 http://picflow.koolearn.com/upload/papers/20140823/20140823162923119572.gif,则关于 http://picflow.koolearn.com/upload/papers/20140823/20140823162923135287.gif的零点叙述正确的是(   )

    A.当a=0时,函数http://picflow.koolearn.com/upload/papers/20140823/20140823162923135287.gif有两个零点

    B.函数http://picflow.koolearn.com/upload/papers/20140823/20140823162923135287.gif必有一个零点是正数[

    C.当http://picflow.koolearn.com/upload/papers/20140823/20140823162923182252.gif时,函数http://picflow.koolearn.com/upload/papers/20140823/20140823162923135287.gif有两个零点

    D.当http://picflow.koolearn.com/upload/papers/20140823/20140823162923322250.gif时,函数http://picflow.koolearn.com/upload/papers/20140823/20140823162923135287.gif有一个零点

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  • 8如图,由曲线 http://picflow.koolearn.com/upload/papers/20140823/20140823170306380391.gif,直线 http://picflow.koolearn.com/upload/papers/20140823/20140823170306396303.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823170306411187.gif轴围成的封闭图形的面积是( ) http://picflow.koolearn.com/upload/papers/20140823/201408231703064892594.jpg

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823170306505591.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823170306692622.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823170306708565.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823170306723931.gif

    开始考试点击查看答案
  • 9函数 http://picflow.koolearn.com/upload/papers/20140823/20140823162919360866.gif的图象经过四个象限,则实数 http://picflow.koolearn.com/upload/papers/20140823/20140823162919391192.gif的取值范围是(   )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823162919422534.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823162919438543.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823162919453437.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823162919469545.gif

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  • 10用边长为48 cm的正方形铁皮做一个无盖的铁盒时,在铁皮的四角各截去一个面积相等的小正方形,然后把四边折起,就能焊接成铁盒,所做的铁盒容积最大时,在四角截去的正方形的边长为          (     )

    A.12 cm.

    B.16cm.

    C.4 cm.

    D.8 cm.

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