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如图所示是y=f(x)的导数y=f′(x)的图象,下列四个结论: ①f(x)在区间(-3,1)上是增函数; ②x=-1是f(x)的极小值点; ③f(x)在区间(2,4)上是减函数,在区间(-1,2)上是增函数; ④x=2是f(x)的极小值点. 其中正确的结论是(  )

发布时间:2021-07-16

A.①②③

B.②③

C.③④

D.①③④ http://picflow.koolearn.com/upload/papers/20140611/201406111323075451984.png

试卷相关题目

  • 1如图是函数y=f(x)的导函数y=f′(x)的图象,则下面判断正确的是(  )

    A.在区间(-3,1)内f(x)是增函数

    B.在x=2时f(x)取得极大值

    C.在(4,5)内f(x)是增函数

    D.在x=2时f(x)取到极小值 http://picflow.koolearn.com/upload/papers/20140611/2014061114174380111625.png

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  • 2若函数 http://picflow.koolearn.com/upload/papers/20140823/20140823120006327843.gif在区间 http://picflow.koolearn.com/upload/papers/20140823/20140823120006342346.gif内单调递增,则 a的取值范围是             http://picflow.koolearn.com/upload/papers/20140823/20140823120006389332.jpg

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823120006420311.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823120006436424.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823120006467474.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823120006483327.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823120006389332.jpg

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  • 3若函数 http://picflow.koolearn.com/upload/papers/20140823/20140823121244504504.gif的递减区间为 http://picflow.koolearn.com/upload/papers/20140823/20140823121244519613.gif,则 http://picflow.koolearn.com/upload/papers/20140823/20140823121244628192.gif的取值范围是(       )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823121244644250.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823121244675300.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823121244691234.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823121244706286.gif

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  • 4函数y=x3-2ax+a在(0,1)内有极小值,则实数a的取值范围是(  )

    A.(0,3)

    B.(0,32)

    C.(0,+∞)

    D.(-∞,3)

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  • 5函数 http://picflow.koolearn.com/upload/papers/20140823/20140823121347949467.gif在[0, http://picflow.koolearn.com/upload/papers/20140823/20140823121347965233.gif]上取得最大值时,x的值为(   )

    A.1

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823121347996239.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823121348011230.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823121347965233.gif

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  • 6如图是导函数y=f′(x)的图象,在标记的点(  )处,函数y=f(x)有极大值.

    A.x2

    B.x3

    C.x5

    D.x4 http://picflow.koolearn.com/upload/papers/20140611/201406111341057267723.png

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  • 7函数f(x)=(x-3)ex的单调递增区间是(  )

    A.(2,+∞)

    B.(-∞,2)

    C.(1,4)

    D.(0,3)

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  • 8f(x)是定义在(0,+∞)上的非负可导函数,且满足xf′(x)≤f(x),对任意的正数a、b,若a<b,则必有(  )

    A.af(a)≤bf(b)

    B.af(a)≥bf(b)

    C.af(b)≤bf(a)

    D.af(b)≥bf(a)

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  • 9已知函数f(x)=ax3+bx2+cx(a>0),记g(x)为f(x)的导函数,若f(x)在R上存在反函数,且b>0,则的最小值为(  )

    A.4

    B.52

    C.2

    D.32

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  • 10函数y=x-sinx在R上是(  )

    A.增函数

    B.减函数

    C.有增有减函数

    D.单调性不确定

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