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函数f(x)的定义域是R,f(0)=2,对任意x∈R,f(x)+f′(x)>1,则不等式e x·f(x)>e x+1的解集为(  )

发布时间:2021-07-16

A.{x|x>0}

B.{x|x<0}

C.{x|x<-1或x>1}

D.{x|x<-1或0

试卷相关题目

  • 1设函数 http://picflow.koolearn.com/upload/papers/20140824/20140824052909785506.png在R上可导,其导函数为 http://picflow.koolearn.com/upload/papers/20140824/20140824052909816528.png且函数 http://picflow.koolearn.com/upload/papers/20140824/20140824052909832749.png的图像如图所示,则下列结论一定成立的是(    ) http://picflow.koolearn.com/upload/papers/g02/20141014/2014101412052991411206.jpg 

    A.函数http://picflow.koolearn.com/upload/papers/20140824/20140824052909785506.png的极大值是http://picflow.koolearn.com/upload/papers/20140824/20140824052909894513.png,极小值是http://picflow.koolearn.com/upload/papers/20140824/20140824052909894461.png

    B.函数http://picflow.koolearn.com/upload/papers/20140824/20140824052909785506.png的极大值是http://picflow.koolearn.com/upload/papers/20140824/20140824052909926532.png,极小值是http://picflow.koolearn.com/upload/papers/20140824/20140824052909894461.png

    C.函数http://picflow.koolearn.com/upload/papers/20140824/20140824052909785506.png的极大值是http://picflow.koolearn.com/upload/papers/20140824/20140824052909894513.png,极小值是http://picflow.koolearn.com/upload/papers/20140824/20140824052909926532.png

    D.函数http://picflow.koolearn.com/upload/papers/20140824/20140824052909785506.png的极大值是http://picflow.koolearn.com/upload/papers/20140824/20140824052909926532.png,极小值是http://picflow.koolearn.com/upload/papers/20140824/20140824052909894513.png

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  • 2若函数 http://picflow.koolearn.com/upload/papers/20140824/20140824050714750447.png满足 http://picflow.koolearn.com/upload/papers/20140824/20140824050714797705.png,设 http://picflow.koolearn.com/upload/papers/20140824/20140824050714812631.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824050714828549.png,则 http://picflow.koolearn.com/upload/papers/20140824/20140824050714843396.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824050714859262.png的大小关系为( )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824050714875500.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824050714890498.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824050714921495.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824050714937503.png

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  • 3已知f(x)=x 3+x,若a,b, http://picflow.koolearn.com/upload/papers/20140824/20140824052550401404.png,且a+b>0,a+c>0,b+c>0,则f(a)+f(b)+f(c)的值(   )

    A.一定大于0

    B.一定等于0

    C.一定小于0

    D.正负都有可能

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  • 4函数 http://picflow.koolearn.com/upload/papers/20140824/20140824052054687757.png在区间 http://picflow.koolearn.com/upload/papers/20140824/20140824052054718515.png上单调递增,则实数 http://picflow.koolearn.com/upload/papers/20140824/20140824052054734283.png的取值范围是(   )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824052054750403.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824052054781393.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824052054796474.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824052054812470.png

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  • 5函数y= http://picflow.koolearn.com/upload/papers/20140824/20140824045224129338.pngx 2 http://picflow.koolearn.com/upload/papers/20140824/20140824045224144165.png㏑x的单调递减区间为(    )

    A.(http://picflow.koolearn.com/upload/papers/20140824/20140824045224144162.png1,1]

    B.(0,1]

    C.[1,+∞)

    D.(0,+∞)

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  • 6函数 http://picflow.koolearn.com/upload/papers/20140824/20140824052549887727.png,若对于区间[-3,2]上的任意x 1,x 2,都有|f(x 1)-f(x 2)|≤t,则实数t的最小值是(   )

    A.20

    B.18

    C.3

    D.1

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  • 7函数 http://picflow.koolearn.com/upload/papers/20140824/20140824052053751447.png的导函数 http://picflow.koolearn.com/upload/papers/20140824/20140824052053767481.png的图像如图所示,则(   ) http://picflow.koolearn.com/upload/papers/20140824/201408240520537983089.png

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824052053814443.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824052053751447.png的极大值点

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824052053845392.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824052053751447.png的极大值点

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824052053876383.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824052053751447.png的极大值点

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824052053923367.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824052053751447.png的极小值点

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  • 8函数 http://picflow.koolearn.com/upload/papers/20140824/20140824050633269695.png是减函数的区间为 (     )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824050633285552.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824050633301548.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824050633316517.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824050633332477.png

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  • 9函数 http://picflow.koolearn.com/upload/papers/20140824/20140824045456322487.png,函数 http://picflow.koolearn.com/upload/papers/20140824/20140824045456338361.png,它们的定义域均为 http://picflow.koolearn.com/upload/papers/20140824/20140824045456354261.png,并且函数 http://picflow.koolearn.com/upload/papers/20140824/20140824045456369234.png的图像始终在函数 http://picflow.koolearn.com/upload/papers/20140824/20140824045456385240.png的上方,那么 http://picflow.koolearn.com/upload/papers/20140824/20140824045456385146.png的取值范围是(   )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824045456400272.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824045456416256.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824045456432365.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824045456447338.png

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  • 10设f(x)=- http://picflow.koolearn.com/upload/papers/20140824/20140824052727012327.pngx 3+ http://picflow.koolearn.com/upload/papers/20140824/20140824052727028338.pngx 2+2ax,若f(x)在( http://picflow.koolearn.com/upload/papers/20140824/20140824052727059382.png,+∞)上存在单调递增区间,则实数a的取值范围为(  )

    A.a>-http://picflow.koolearn.com/upload/papers/20140824/20140824052727075330.png

    B.a<-http://picflow.koolearn.com/upload/papers/20140824/20140824052727075330.png

    C.a>http://picflow.koolearn.com/upload/papers/20140824/20140824052727075330.png

    D.不存在

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