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函数f(x)=http://picflow.koolearn.com/upload/papers/g02/20120414/20120414155135824986.gif 

发布时间:2021-07-15

A.在(0,2)上单调递减

B.在(-∞,1)和(2,+∞)上单调递增

C.在(0,2)上单调递增

D.在(-∞,0)和(2,+∞)上单调递减

试卷相关题目

  • 1f(x)是定义在(0,+∞)上的非负可导函数,且满足xf′(x)+f(x)≤0,对任意正数a、b,若a<b,则必有

    A.af(b)≤bf(a)

    B.bf(a)≤af(b)

    C.af(a)≤f(b)

    D.bf(b)≤f(a)

    开始考试点击查看答案
  • 2若函数f(x)=x3-ax2-x+6在(0,1)内单调递减,则实数a的取值范围是

    A.a≥1

    B.a=1

    C.a≤1

    D.0<a<1

    开始考试点击查看答案
  • 3定义在区间[0,a]上的函数f(x)的图像如右图所示,记以A(0,f(0)),B(a,f(a)), C(x,f(x))为顶点的三角形面积为S(x),则函数S(x)的导函数S ′ (x)的图像大致是http://picflow.koolearn.com/upload/papers/g02/20120424/201204240925571931762.gif

    A.http://picflow.koolearn.com/upload/papers/g02/20120424/201204240925572411591.gif

    B.http://picflow.koolearn.com/upload/papers/g02/20120424/201204240925572701615.gif

    C.http://picflow.koolearn.com/upload/papers/g02/20120424/201204240925572981610.gif

    D.http://picflow.koolearn.com/upload/papers/g02/20120424/201204240925573241623.gif

    开始考试点击查看答案
  • 4已知R上的不间断函数g(x)满足:①当x>0时,g′(x)>0恒成立;②对任意的x∈R都有g(x)=g(-x)。 又函数f(x)满足:对任意的x∈R,都有f(http://picflow.koolearn.com/upload/papers/g02/20120503/20120503102327999883.gif+x)=-f(x)成立,当x∈[0,http://picflow.koolearn.com/upload/papers/g02/20120503/20120503102328046883.gif]时,f(x)=x3-3x。若关于x的不等式g[f(x)]≤g(a2-a+2)对x∈[-3,3]恒成立,则a的取值范围

    A.a≤0或a≥1

    B.0≤a≤1

    C.-1≤a≤1

    D.a∈R

    开始考试点击查看答案
  • 5函数y=xcosx﹣sinx在下面哪个区间内是增函数

    A.(http://picflow.koolearn.com/upload/papers/g02/20120831/20120831215952347736.pnghttp://picflow.koolearn.com/upload/papers/g02/20120831/20120831215952502978.png

    B.(http://picflow.koolearn.com/upload/papers/g02/20120831/20120831215952618225.png,2http://picflow.koolearn.com/upload/papers/g02/20120831/20120831215952733225.png

    C.(http://picflow.koolearn.com/upload/papers/g02/20120831/20120831215952864978.pnghttp://picflow.koolearn.com/upload/papers/g02/20120831/20120831215952996983.png

    D.(2http://picflow.koolearn.com/upload/papers/g02/20120831/20120831215953119225.png,3http://picflow.koolearn.com/upload/papers/g02/20120831/20120831215953234225.png

    开始考试点击查看答案
  • 6设函数f(x)在定义域内可导,y=f(x)的图象如图所示,则导函数y=f"(x)可能  http://picflow.koolearn.com/upload/papers/g02/20120926/201209261437470766240.png

    A.http://picflow.koolearn.com/upload/papers/g02/20120828/201208281939367306614.png

    B.http://picflow.koolearn.com/upload/papers/g02/20120828/201208281939367636259.png

    C.http://picflow.koolearn.com/upload/papers/g02/20120828/201208281939367966229.png

    D.http://picflow.koolearn.com/upload/papers/g02/20120828/201208281939368395943.png

    开始考试点击查看答案
  • 7已知函数http://picflow.koolearn.com/upload/papers/g02/20120902/201209022055307274572.png满足对任意的实数x1≠x2都有http://picflow.koolearn.com/upload/papers/g02/20120902/201209022055307593030.png成立,则实数a的取值范围为

    A.(﹣∞,2)

    B.http://picflow.koolearn.com/upload/papers/g02/20120902/201209022055307891716.png

    C.(﹣∞,2]

    D.http://picflow.koolearn.com/upload/papers/g02/20120902/201209022055308201697.png

    开始考试点击查看答案
  • 8定义在区间[0,a]上的函数f(x)的图象如图所示,记以A(0,f(0)),B(a,f(a)),C(x,f(x))为顶点的三角形的面积为S(x),则函数S(x)的导函数S"(x)的图象大致是http://picflow.koolearn.com/upload/papers/g02/20120826/201208261935119186039.png 

    A.http://picflow.koolearn.com/upload/papers/g02/20120826/201208261935119455362.png

    B.http://picflow.koolearn.com/upload/papers/g02/20120826/201208261935119705469.png

    C.http://picflow.koolearn.com/upload/papers/g02/20120826/201208261935120016022.png

    D.http://picflow.koolearn.com/upload/papers/g02/20120826/201208261935120275512.png

    开始考试点击查看答案
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