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用数学归纳法证明: http://picflow.koolearn.com/upload/papers/20140823/201408231303122041001.gif,由 http://picflow.koolearn.com/upload/papers/20140823/20140823130312219346.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823130312235390.gif,不等式左端变化的是( )

发布时间:2021-07-12

A.增加http://picflow.koolearn.com/upload/papers/20140823/20140823130312251359.gif一项

B.增加http://picflow.koolearn.com/upload/papers/20140823/20140823130312266312.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823130312251359.gif两项

C.增加http://picflow.koolearn.com/upload/papers/20140823/20140823130312266312.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823130312251359.gif两项,同时减少http://picflow.koolearn.com/upload/papers/20140823/20140823130312344236.gif一项

D.增加http://picflow.koolearn.com/upload/papers/20140823/20140823130312266312.gif一项,同时减少http://picflow.koolearn.com/upload/papers/20140823/20140823130312344236.gif一项

试卷相关题目

  • 1下列三句话按“三段论”模式排列顺序正确的是(***) ① y =" sin" x( x ∈ R )是三角函数;② 三角函数是周期函数; ③ y =" sin" x( x ∈ R )是周期函数。

    A.① ② ③

    B.② ① ③

    C.② ③ ①

    D.③ ② ①

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  • 2已知 http://picflow.koolearn.com/upload/papers/20140823/20140823122319628287.gif是定义域为正整数集的函数,对于定义域内任意的 http://picflow.koolearn.com/upload/papers/20140823/20140823122319659199.gif,若  http://picflow.koolearn.com/upload/papers/20140823/20140823122319674372.gif成立,则 http://picflow.koolearn.com/upload/papers/20140823/20140823122319690625.gif成立,下列命题成立的是

    A.若http://picflow.koolearn.com/upload/papers/20140823/20140823122319877345.gif成立,则对于任意http://picflow.koolearn.com/upload/papers/20140823/20140823122319893243.gif,均有http://picflow.koolearn.com/upload/papers/20140823/20140823122319674372.gif成立;

    B.若http://picflow.koolearn.com/upload/papers/20140823/20140823122319924372.gif成立,则对于任意的http://picflow.koolearn.com/upload/papers/20140823/20140823122319955247.gif,均有http://picflow.koolearn.com/upload/papers/20140823/20140823122319986361.gif成立;

    C.若http://picflow.koolearn.com/upload/papers/20140823/20140823122320033368.gif成立,则对于任意的http://picflow.koolearn.com/upload/papers/20140823/20140823122320049239.gif,均有http://picflow.koolearn.com/upload/papers/20140823/20140823122319986361.gif成立;

    D.若http://picflow.koolearn.com/upload/papers/20140823/20140823122320158355.gif成立,则对于任意的http://picflow.koolearn.com/upload/papers/20140823/20140823122319955247.gif,均有http://picflow.koolearn.com/upload/papers/20140823/20140823122319674372.gif成立。

    开始考试点击查看答案
  • 3用数学归纳法证明不等式 http://picflow.koolearn.com/upload/papers/20140823/201408231352596251288.png的过程中,由 http://picflow.koolearn.com/upload/papers/20140823/20140823135259687409.png递推到 http://picflow.koolearn.com/upload/papers/20140823/20140823135259703468.png时的不等式左边(   )

    A.增加了http://picflow.koolearn.com/upload/papers/20140823/20140823135259718206.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823135259937593.png

    B.增加了 项http://picflow.koolearn.com/upload/papers/20140823/20140823135259999731.png

    C.增加了“http://picflow.koolearn.com/upload/papers/20140823/20140823135259999731.png”,又减少了“http://picflow.koolearn.com/upload/papers/20140823/20140823135300030416.png

    D.增加了http://picflow.koolearn.com/upload/papers/20140823/20140823135259937593.png,减少了“http://picflow.koolearn.com/upload/papers/20140823/20140823135300030416.png

    开始考试点击查看答案
  • 4用数学归纳法证明3 k≥ n 3( n≥3, n∈N)第一步应验证(    )

    A.n="1"

    B.n="2"

    C.n="3"

    D.n=4

    开始考试点击查看答案
  • 5使得 http://picflow.koolearn.com/upload/papers/20140823/20140823124044533387.gif是完全平方数的正整数 http://picflow.koolearn.com/upload/papers/20140823/20140823124044549192.gif有(   )

    A.0个

    B.1个

    C.2个

    D.3个

    开始考试点击查看答案
  • 6某个命题与正整数 http://picflow.koolearn.com/upload/papers/20140823/20140823122807947189.gif有关,若 http://picflow.koolearn.com/upload/papers/20140823/20140823122807963526.gif时该命题成立,那么可推得 http://picflow.koolearn.com/upload/papers/20140823/20140823122807978376.gif时该命题也成立,现已知 http://picflow.koolearn.com/upload/papers/20140823/20140823122807994225.gif时,该命题不成立,则可以推得(   )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823122808010237.gif时该命题成立

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823122808010237.gif时该命题不成立

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823122808041227.gif时该命题成立

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823122808041227.gif时该命题不成立

    开始考试点击查看答案
  • 7用数学归纳法证明: http://picflow.koolearn.com/upload/papers/20140823/20140823144914519946.gif时,在证明从n=k到n=k+1时,左边增加的项数为(  )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823144914535209.gif+1

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823144914566225.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823144914535209.gif-1

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823144914535209.gif

    开始考试点击查看答案
  • 8用数学归纳法证明等式: http://picflow.koolearn.com/upload/papers/20140823/20140823150718924639.gif时,当n=1时的左边等于(    )

    A.4

    B.3

    C.2

    D.1

    开始考试点击查看答案
  • 9某个命题与正整数 http://picflow.koolearn.com/upload/papers/20140823/20140823123409447189.gif有关,若 http://picflow.koolearn.com/upload/papers/20140823/20140823123409462508.gif时该命题成立,那么可推得 http://picflow.koolearn.com/upload/papers/20140823/20140823123409478274.gif时该命题也成立,现在已知当 http://picflow.koolearn.com/upload/papers/20140823/20140823123409509223.gif时该命题不成立,那么可推得

    A.当http://picflow.koolearn.com/upload/papers/20140823/20140823123409556236.gif时,该命题不成立

    B.当http://picflow.koolearn.com/upload/papers/20140823/20140823123409556236.gif时,该命题成立

    C.当http://picflow.koolearn.com/upload/papers/20140823/20140823123409634227.gif时,该命题不成立

    D.当http://picflow.koolearn.com/upload/papers/20140823/20140823123409634227.gif时,该命题成立

    开始考试点击查看答案
  • 10用数学归纳法证明 http://picflow.koolearn.com/upload/papers/20140823/20140823150749110863.gif时,在验证n=1成立时,左边的项应该是(   )

    A.4

    B.1

    C.2

    D.3

    开始考试点击查看答案
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