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下面四个判断中,正确的是(  )

发布时间:2021-07-12

A.式子1+k+k2+…+kn(n∈N*)中,当n=1时式子值为1

B.式子1+k+k2+…+kn-1(n∈N*)中,当n=1时式子值为1+k

C.式子1+http://picflow.koolearn.com/upload/papers/20140824/20140824044642004478.png+…+http://picflow.koolearn.com/upload/papers/20140824/20140824044642020496.png(n∈N*)中,当n=1时式子值为1+http://picflow.koolearn.com/upload/papers/20140824/20140824044642004478.png

D.设f(x)=http://picflow.koolearn.com/upload/papers/20140824/20140824044642067774.png(n∈N*),则f(k+1)=f(k)+http://picflow.koolearn.com/upload/papers/20140824/20140824044642082854.png

试卷相关题目

  • 1观察式子: http://picflow.koolearn.com/upload/papers/20140823/20140823213453292628.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823213453307705.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823213453339819.png ……可归纳出式子为(  )。

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823213453370958.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823213453385967.png

    C.http://picflow.koolearn.com/upload/papers/20140823/201408232134534011004.png

    D.http://picflow.koolearn.com/upload/papers/20140823/201408232134534171049.png

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  • 2用数学归纳法证明:1+ http://picflow.koolearn.com/upload/papers/20140823/20140823223533839336.png+ http://picflow.koolearn.com/upload/papers/20140823/20140823223533855325.png+ http://picflow.koolearn.com/upload/papers/20140823/201408232235338701083.png时,在第二步证明从n=k到n=k+1成立时,左边增加的项数是(   )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823223533886366.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823223533901412.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823223533917168.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823223533933391.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823223533948420.png

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  • 3利用数学归纳法证明“1+a+a 2+…+a n +1 = http://picflow.koolearn.com/upload/papers/20140823/20140823213213657564.png, (a≠1,n∈N)”时,在验证n=1成立时,左边应该是(   )

    A.1

    B.1+a

    C.1+a+a2

    D.1+a+a2+a3

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  • 4用数学归纳法证明“(n+1)(n+2)·…·(n+n)=2n·1·3·…·(2n-1)”,从“k到k+1”左端需增乘的代数式为(  )

    A.2k+1

    B.2(2k+1)

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823214026820518.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823214026836572.png

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  • 5用数学归纳法证明不等式2 n>n 2时,第一步需要验证n 0=_____时,不等式成立(    )

    A.5

    B.2和4

    C.3

    D.1

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  • 6已知f(n)=(2n+7)·3 n+9,存在自然数m,使得对任意n∈N *,f(n)都能被m整除,则m的最大值为(  )

    A.18

    B.36

    C.48

    D.54

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  • 7证明 http://picflow.koolearn.com/upload/papers/20140823/201408232219409271350.png时,假设当 http://picflow.koolearn.com/upload/papers/20140823/20140823221940942412.png时成立,则当 http://picflow.koolearn.com/upload/papers/20140823/20140823221940958297.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823221940989384.png时,左边增加的项数为(    )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823221941005206.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823221941020291.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823221941036169.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823221941067312.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823221941098367.png

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  • 8用数学归纳法证明“ http://picflow.koolearn.com/upload/papers/20140823/201408232135080651479.png”时,在验证 http://picflow.koolearn.com/upload/papers/20140823/20140823213508081357.png成立时,左边应该是(       )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823213508096444.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823213508112545.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823213508299342.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823213508315206.png

    开始考试点击查看答案
  • 9在用数学归纳法证明 http://picflow.koolearn.com/upload/papers/20140824/201408240111373191238.png时,则当 http://picflow.koolearn.com/upload/papers/20140824/20140824011137334468.png时左端应在 http://picflow.koolearn.com/upload/papers/20140824/20140824011137365409.png的基础上加上的项是(  )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824011137381425.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824011137397521.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824011137412791.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824011137428869.png

    开始考试点击查看答案
  • 10用数学归纳法证明等式 http://picflow.koolearn.com/upload/papers/20140824/201408240043407681633.png,从“k到k+1”左端需增乘的代数式为(  )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824004340784608.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824004340815461.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824004340830562.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824004340846606.png

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