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用数学归纳法证明不等式http://picflow.koolearn.com/upload/papers/g02/20110714/201107141129430001547.gif(n∈N*)成立, 其初始值至少应取

发布时间:2021-07-12

A.7

B.8

C.9

D.10

试卷相关题目

  • 1方程组http://picflow.koolearn.com/upload/papers/g02/20110707/201107071020385831082.gif的解集是

    A.http://picflow.koolearn.com/upload/papers/g02/20110707/20110707102038614986.gif

    B.{x,y|x=3且y=-7}

    C.{3,-7}

    D.{(x,y)|x=3且y=-7}

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  • 2用数学归纳法证明“http://picflow.koolearn.com/upload/papers/g02/20110302/201103021150507271339.gif”时,由n=k(k>1)不等式成立,推证n=k+1时,左边应增加的项数是

    A.http://picflow.koolearn.com/upload/papers/g02/20110302/20110302115109071882.gif

    B.http://picflow.koolearn.com/upload/papers/g02/20110302/20110302115114587894.gif

    C.http://picflow.koolearn.com/upload/papers/g02/20110302/20110302115120634865.gif

    D.http://picflow.koolearn.com/upload/papers/g02/20110302/20110302115126274902.gif

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  • 3对任意实数x,y,定义运算x*y=ax+by+cxy,其中a,b,c是常数,等式右边的运算是通常的加法和乘法运算。已知1*2=3,2*3=4,并且有一个非零常数m,使得对任意实数 x,都有x*m=x,则m的值是(   )

    A.4

    B.-4

    C.-5

    D.6

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  • 4利用数学归纳法证明不等式http://picflow.koolearn.com/upload/papers/g02/20110210/201102101529163881244.gif时,由k递推到k+1时,左边应添加的因式为

    A.http://picflow.koolearn.com/upload/papers/g02/20110210/20110210153044122996.gif

    B.http://picflow.koolearn.com/upload/papers/g02/20110210/201102101530485911109.gif

    C.http://picflow.koolearn.com/upload/papers/g02/20110210/201102101530531691102.gif

    D.http://picflow.koolearn.com/upload/papers/g02/20110210/20110210153058169955.gif

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  • 5方程组http://picflow.koolearn.com/upload/papers/g02/20110408/201104081433479211156.gif的解集是(   )

    A.{(-3,0)}

    B.{-3,0}

    C.(-3,0)

    D.{(0,-3)}

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  • 6对任意实数x,y,定义运算x*y为:x*y=ax+by+cxy,其中a,b,c为常数,等式右端运算为通常的实数加法和乘法,现已知1*2=3,2*3 =4,并且有一个非零实数m,使得对于任意的实数都有x*m=x,则d的值为(      )

    A.4

    B.1

    C.3

    D.不确定

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  • 7用数学归纳法证明“当n 为正奇数时, http://picflow.koolearn.com/upload/papers/20140823/20140823145558216380.gif能被 http://picflow.koolearn.com/upload/papers/20140823/20140823145558232342.gif整除”,在第二步时,正确的证法是(     )

    A.假设http://picflow.koolearn.com/upload/papers/20140823/20140823145558263512.gif,证明http://picflow.koolearn.com/upload/papers/20140823/20140823145558279390.gif命题成立

    B.假设http://picflow.koolearn.com/upload/papers/20140823/20140823145558294584.gif,证明http://picflow.koolearn.com/upload/papers/20140823/20140823145558279390.gif命题成立

    C.假设http://picflow.koolearn.com/upload/papers/20140823/20140823145558326572.gif,证明http://picflow.koolearn.com/upload/papers/20140823/20140823145558279390.gif命题成立

    D.假设http://picflow.koolearn.com/upload/papers/20140823/20140823145558294584.gif,证明http://picflow.koolearn.com/upload/papers/20140823/20140823145558357391.gif命题成立

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  • 8利用数学归纳法证明“ http://picflow.koolearn.com/upload/papers/20140823/20140823150758953813.gif”的过程中, 由“n=k”变到“n=k+1”时,不等式左边的变化是(  )

    A.增加http://picflow.koolearn.com/upload/papers/20140823/20140823150758953437.gif

    B.增加http://picflow.koolearn.com/upload/papers/20140823/20140823150758969402.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823150758985406.gif

    C.增加http://picflow.koolearn.com/upload/papers/20140823/20140823150758985406.gif,并减少http://picflow.koolearn.com/upload/papers/20140823/20140823150759016379.gif

    D.增加http://picflow.koolearn.com/upload/papers/20140823/20140823150758969402.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823150758985406.gif,并减少http://picflow.koolearn.com/upload/papers/20140823/20140823150759016379.gif

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  • 9用数学归纳法证明 http://picflow.koolearn.com/upload/papers/20140823/20140823142708657689.gif,则当n=k+1时左端应在n=k的基础上加上(  )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823142708719717.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823142708735317.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823142708766646.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823142708782252.gif

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  • 10用数学归纳法证明不等式 http://picflow.koolearn.com/upload/papers/20140823/201408231412514041033.png成立,起始值至少应取为( )

    A.7

    B.8

    C.9

    D.10

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