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函数f(x)=x3+x2+cx+d(a<b)在R上单调递增,则的最小值为(  )

发布时间:2021-07-16

A.1

B.3

C.4

D.9

试卷相关题目

  • 1函数y=的图象大致是(  )

    A.http://picflow.koolearn.com/upload/papers/20140611/201406111408211862694.png

    B.http://picflow.koolearn.com/upload/papers/20140611/201406111408213102910.png

    C.http://picflow.koolearn.com/upload/papers/20140611/201406111408213882756.png

    D.http://picflow.koolearn.com/upload/papers/20140611/201406111408221533241.png

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  • 2已知函数f(x)是定义在R上的奇函数,f(2)=0,当x>0时,有xf′(x)-f(x)<0成立,则不等式x2?f(x)>0的解集是(  )

    A.(-2,0)∪(2,+∞)

    B.(-∞,-2)∪(2,+∞)

    C.(-2,0)∪(0,2)

    D.(-∞,-2)∪(0,2)

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  • 3http://picflow.koolearn.com/upload/papers/20140823/20140823121306593526.gif的单调增区间是(        )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823121306609522.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823121306625510.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823121306671518.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823121306703519.gif

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  • 4已知f(x)为定义在(-∞,+∞)上的可导函数,且f(x)>f′(x)对于x∈R恒成立(e为自然对数的底),则(  )

    A.e2011?f(2012)<e2012?f(2011)

    B.e2011?f(2012)=e2012?f(2011)

    C.e2011?f(2012)>e2012?f(2011)

    D.e2011?f(2012)与e2012?f(2011)大小不确定

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  • 5函数y=f(x)的定义域为R,它的导函数y=f′(x)的部分图象如图所示,则下面判断正确的是(  )

    A.在(1,2)内函数f(x)为增函数

    B.在(1,3)内函数f(x)为减函数

    C.在(3,5)内函数f(x)为增函数

    D.x=3是函数y=f(x)在区间[1,5]上的极小值点 http://picflow.koolearn.com/upload/papers/20140611/201406111128364822174.png

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  • 6如图所示为二次函数f(x)的图象,若函数g(x)=f"(x)f(x),(f"(x)是f(x)的导函数),则g(x)的图象是(  )

    A.http://picflow.koolearn.com/upload/papers/20140611/201406111310064993053.png

    B.http://picflow.koolearn.com/upload/papers/20140611/201406111310065773254.png

    C.http://picflow.koolearn.com/upload/papers/20140611/201406111310069362527.png

    D.http://picflow.koolearn.com/upload/papers/20140611/201406111310070292729.png http://picflow.koolearn.com/upload/papers/20140611/201406111310074043587.png

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  • 7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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  • 8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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  • 9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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  • 10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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