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我们常用以下方法求形如y=f(x)g(x)的函数的导数:先两边同取自然对数得:lny=g(x)lnf(x), 再两边同时求导得到:http://picflow.koolearn.com/upload/papers/g02/20121002/201210021734083036207.png于是得到: y ′= f(x)g(x)http://picflow.koolearn.com/upload/papers/g02/20121002/201210021734088023562.png运用此方法求得函数http://picflow.koolearn.com/upload/papers/g02/20121002/201210021734092811032.png的一个单调递增区间是

发布时间:2021-07-15

A.(e,4)

B.(3,6)

C.(0,e)

D.(2,3)

试卷相关题目

  • 1函数f(x)的定义域为开区间(a,b),导函数f′(x)在(a,b)内的图象如图所示,则函数f(x)在开区间(a,b)内有极大值点(  )

    A.1个

    B.2个

    C.3个

    D.4个魔方格

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  • 2函数http://picflow.koolearn.com/upload/papers/g02/20121012/20121012093408216499.png在定义域内http://picflow.koolearn.com/upload/papers/g02/20121012/20121012093408372721.png的图象如图所示,记http://picflow.koolearn.com/upload/papers/g02/20121012/20121012093408532548.png的导函数为http://picflow.koolearn.com/upload/papers/g02/20121012/20121012093408669524.png,则不等式http://picflow.koolearn.com/upload/papers/g02/20121012/20121012093408802624.png的解集为 http://picflow.koolearn.com/upload/papers/g02/20121009/2012100910142885812790.png

    A.http://picflow.koolearn.com/upload/papers/g02/20121012/20121012093408930948.png

    B.http://picflow.koolearn.com/upload/papers/g02/20121012/20121012093409065887.png

    C.http://picflow.koolearn.com/upload/papers/g02/20121012/201210120934092191008.png

    D.http://picflow.koolearn.com/upload/papers/g02/20121012/201210120934093421347.png

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  • 3函数f(x)的定义域为(a,b),导函数f"(x)在(a,b)内的图象如图所示,则函数f(x)在开区间(a,b)内有极值点(  )

    A.1个

    B.2个

    C.3个

    D.4个魔方格

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  • 4函数y=x3+x的递增区间是 

    A.(0,+∞)  

    B.(﹣∞,1)  

    C.(﹣∞,+∞)  

    D.(1,+∞)

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  • 5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

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  • 6函数y=f(x)在定义域(﹣http://picflow.koolearn.com/upload/papers/g02/20120922/20120922103925252603.png,3)内可导,其图象如图所示.记y=f(x)的导函数为y=f"(x),则不等式f"(x)≤0的解集为http://picflow.koolearn.com/upload/papers/g02/20120922/2012092210392606312849.png

    A.[﹣http://picflow.koolearn.com/upload/papers/g02/20120922/20120922103926544554.png,1]∪[2,3)

    B.[﹣1,http://picflow.koolearn.com/upload/papers/g02/20120922/20120922103927012559.png]∪[http://picflow.koolearn.com/upload/papers/g02/20120922/20120922103927429616.pnghttp://picflow.koolearn.com/upload/papers/g02/20120922/20120922103927845567.png]

    C.[﹣http://picflow.koolearn.com/upload/papers/g02/20120922/20120922103928269564.pnghttp://picflow.koolearn.com/upload/papers/g02/20120922/20120922103928686533.png]∪[1,2)

    D.(﹣http://picflow.koolearn.com/upload/papers/g02/20120922/20120922103929106564.png,﹣http://picflow.koolearn.com/upload/papers/g02/20120922/20120922103929522526.png]∪[http://picflow.koolearn.com/upload/papers/g02/20120922/20120922103929983533.pnghttp://picflow.koolearn.com/upload/papers/g02/20120922/20120922103930404584.png]∪[http://picflow.koolearn.com/upload/papers/g02/20120922/20120922103930824584.png,3)

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  • 7已知f(x)=x3-6x2+9x-abc,a<b<c,且f(a)=f(b)=f(c)=0,现给出如下结论: ①f(0)f(1)>0;②f(0)f(1)<0;③f(0)f(3)>0;④f(0)f(3)<0。其中正确结论的序号是 

    A.①③

    B.①④

    C.②③

    D.②④

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  • 8已知f"(x)是f(x)的导函数,在区间[0,+∞)上f"(x)>0,且偶函数f(x)满足f(2x﹣1)<http://picflow.koolearn.com/upload/papers/g02/20120921/20120921214804769560.png,则x的取值范围是 

    A.(http://picflow.koolearn.com/upload/papers/g02/20120921/201209212148061621042.png

    B.http://picflow.koolearn.com/upload/papers/g02/20120921/201209212148135041522.png

    C.(http://picflow.koolearn.com/upload/papers/g02/20120921/201209212148306641037.png

    D.[http://picflow.koolearn.com/upload/papers/g02/20120921/201209212148309391037.png

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  • 9设a>0,b>0,e是自然对数的底数

    A.若ea+2a=eb+3b,则a>b

    B.若ea+2a=eb+3b,则a<b

    C.若ea-2a=eb-3b,则a>b

    D.若ea-2a=eb-3b,则a<b

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  • 10函数http://picflow.koolearn.com/upload/papers/g02/20120916/201209162102583814043.png在区间[﹣1,2]上单调递增,则http://picflow.koolearn.com/upload/papers/g02/20120916/20120916210258522665.png的取值范围是

    A.(﹣∞,﹣1)∪(2,+∞)

    B.(2,+∞)

    C.(﹣∞,﹣1)

    D.(﹣1,2)

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