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函数 http://picflow.koolearn.com/upload/papers/20140823/20140823121244894622.gif,其中 http://picflow.koolearn.com/upload/papers/20140823/20140823121244909260.gif为实数,当 http://picflow.koolearn.com/upload/papers/20140823/20140823121244925434.gif时, http://picflow.koolearn.com/upload/papers/20140823/20140823121245050270.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823121245065204.gif上是(      )

发布时间:2021-07-16

A.增函数

B.减函数

C.常数

D.无法确定函数的单调性

试卷相关题目

  • 1下列区间是函数 http://picflow.koolearn.com/upload/papers/20140823/20140823121124850504.gif的一个减区间的是(      )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823121124866293.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823121124928296.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823121124944422.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823121124975426.gif

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  • 2定义在 http://picflow.koolearn.com/upload/papers/20140823/20140823121640002204.gif上的函数 http://picflow.koolearn.com/upload/papers/20140823/20140823121640142287.gif满足 http://picflow.koolearn.com/upload/papers/20140823/20140823121640173582.gif,当 http://picflow.koolearn.com/upload/papers/20140823/20140823121640204234.gif时, http://picflow.koolearn.com/upload/papers/20140823/20140823121640142287.gif单调递增,如果 http://picflow.koolearn.com/upload/papers/20140823/20140823121640236414.gif,且 http://picflow.koolearn.com/upload/papers/20140823/20140823121640251599.gif,则 http://picflow.koolearn.com/upload/papers/20140823/20140823121640267536.gif的值为(   )

    A.恒小于http://picflow.koolearn.com/upload/papers/20140823/20140823121640298197.gif

    B.恒大于http://picflow.koolearn.com/upload/papers/20140823/20140823121640298197.gif

    C.可能为http://picflow.koolearn.com/upload/papers/20140823/20140823121640298197.gif

    D.可正可负

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  • 3如图是函数y=f(x)的导函数y=f′(x)的图象,则下列说法正确的是(  )

    A.f(1)是f(x)的极大值

    B.f(2)是f(x)的极小值

    C.在(1,3)上f(x)递减

    D.在(-1,2)上f(x)递增 http://picflow.koolearn.com/upload/papers/20140611/201406111412340462725.png

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  • 4对于R上可导的任意函数f(x),若满足x?f′(x)≥0,则必有(  )

    A.f(-1)+f(1)<2f(0)

    B.f(-1)+f(1)>2f(0)

    C.f(-1)+f(1)≤2f(0)

    D.f(-1)+f(1)≥2f(0)

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  • 5定义域R的奇函数f(x),当x∈(-∞,0)时f(x)+xf′(x)<0恒成立,若a=3f(3),b=f(1),c=-2f(-2),则(  )

    A.a>c>b

    B.c>b>a

    C.c>a>b

    D.a>b>c

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  • 6已知定义在R上的奇函数f(x),f(1)=2,对任意的x>0,f"(x)>2,则不等式f(x)>2x的解集为(  )

    A.(-∞,-1)∪(0,1)

    B.(-1,0)∪(0,1)

    C.(-∞,-1)∪(1,+∞)

    D.(-1,0)∪(1,+∞)

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  • 7函数f(x)=ax3+bx2+cx+d的图象如图,且|x1|<|x2|,则有(  ) http://picflow.koolearn.com/upload/papers/20140611/201406111307542577014.png

    A.a>0,b>0,c<0,d>0

    B.a<0,b>0,c<0,d>0

    C.a>0,b<0,c>0,d<0

    D.a<0,b<0,c>0,d>0

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  • 8函数 http://picflow.koolearn.com/upload/papers/20140823/20140823121308122718.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823121308138415.gif上是增函数,则实数 http://picflow.koolearn.com/upload/papers/20140823/20140823121308294192.gif的取值范围是(       )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823121308403253.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823121308419240.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823121308434374.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823121308450294.gif

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  • 9http://picflow.koolearn.com/upload/papers/20140823/20140823121123243244.gif时, http://picflow.koolearn.com/upload/papers/20140823/20140823121123274408.gif,则 http://picflow.koolearn.com/upload/papers/20140823/20140823121123290270.gif的单调减区间是(       )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823121123462422.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823121123477485.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823121123508471.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823121123633296.gif

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  • 10已知函数f(x)=x2+2x+alnx在(0,1)上单调,则实数a的取值范围是(  )

    A.a≥0

    B.a≤-4

    C.a≤-4或a≥0

    D.-4≤a≤0

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