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http://picflow.koolearn.com/upload/papers/20140823/201408231425362581425.gif(  )

发布时间:2021-07-12

A.7

B.8

C.9

D.10

试卷相关题目

  • 1http://picflow.koolearn.com/upload/papers/20140823/20140823140507506728.png展开式中的第四项是(  )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823140507522489.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823140507538496.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823140507553464.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823140507569489.png

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  • 2http://picflow.koolearn.com/upload/papers/20140823/20140823142613261492.gif的展开式中,二项式系数最大项的系数为(  )

    A.-1792

    B.1792

    C.-1120

    D.1120

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  • 3下列四个命题:① http://picflow.koolearn.com/upload/papers/20140823/20140823141251763634.png的常数项是第 http://picflow.koolearn.com/upload/papers/20140823/20140823141251794304.png项;② http://picflow.koolearn.com/upload/papers/20140823/20140823141251810601.png的前 http://picflow.koolearn.com/upload/papers/20140823/20140823141251794304.png项二项式系数之和等于后 http://picflow.koolearn.com/upload/papers/20140823/20140823141251794304.png项二项式系数之和,均等于 http://picflow.koolearn.com/upload/papers/20140823/20140823141251935446.png;③ http://picflow.koolearn.com/upload/papers/20140823/20140823141251950664.png展开式中 http://picflow.koolearn.com/upload/papers/20140823/20140823141251966287.png的正指数项的系数之和大于 http://picflow.koolearn.com/upload/papers/20140823/20140823141251966287.png的负指数项的系数之和④ http://picflow.koolearn.com/upload/papers/20140823/201408231412519971145.png的常数项是 http://picflow.koolearn.com/upload/papers/20140823/20140823141252013359.png其中正确命题的个数为(   )

    A.1

    B.2

    C.3

    D.4

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  • 4如果n是正偶数,则C http://picflow.koolearn.com/upload/papers/20140823/20140823133024045199.gif+C http://picflow.koolearn.com/upload/papers/20140823/20140823133024060192.gif+…+C http://picflow.koolearn.com/upload/papers/20140823/20140823133024138218.gif+C http://picflow.koolearn.com/upload/papers/20140823/20140823133024154196.gif=(   )

    A.2http://picflow.koolearn.com/upload/papers/20140823/20140823133024325178.gif

    B.2http://picflow.koolearn.com/upload/papers/20140823/20140823133024341195.gif

    C.2http://picflow.koolearn.com/upload/papers/20140823/20140823133024357198.gif

    D.(n-1)2http://picflow.koolearn.com/upload/papers/20140823/20140823133024341195.gif

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  • 5已知xy<0,且x+y=1,而 http://picflow.koolearn.com/upload/papers/20140823/20140823135146289418.gif按x的降幂排列的展开式中,第二项不大于第三项,则x的取值范围是 (     )

    A.(-∞,http://picflow.koolearn.com/upload/papers/20140823/20140823135146305220.gif

    B.[http://picflow.koolearn.com/upload/papers/20140823/20140823135146336222.gif+ http://picflow.koolearn.com/upload/papers/20140823/20140823135146351192.gif)

    C.(1,+∞)

    D.(-∞,-http://picflow.koolearn.com/upload/papers/20140823/20140823135146336222.gif]

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  • 6http://picflow.koolearn.com/upload/papers/20140823/20140823130236464416.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823130236480192.gif的降幂排列展开,若 http://picflow.koolearn.com/upload/papers/20140823/20140823130236495250.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823130236573255.gif,且 http://picflow.koolearn.com/upload/papers/20140823/20140823130236605270.gif,当展开式第二项与第三项值相等时, http://picflow.koolearn.com/upload/papers/20140823/20140823130236480192.gif的值为(   )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823130236683220.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823130236807221.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823130236807222.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823130236839222.gif

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  • 7http://picflow.koolearn.com/upload/papers/20140823/20140823133749550456.gif展开式的二项式系数之和为64,则展开式的常数项为( )

    A.10

    B.20

    C.30

    D.120

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  • 8http://picflow.koolearn.com/upload/papers/20140823/20140823134804800489.gif展开式中含 http://picflow.koolearn.com/upload/papers/20140823/20140823134804815187.gif项的系数为                                 

    A.60

    B.80

    C.120

    D.240

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  • 9http://picflow.koolearn.com/upload/papers/20140823/20140823140449207786.png的展开式中,只有第5项的二项式系数最大,则展开式中常数项是(   )

    A.—7

    B.—28

    C.7

    D.28

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  • 10http://picflow.koolearn.com/upload/papers/20140823/20140823142450846960.gif ,则 http://picflow.koolearn.com/upload/papers/20140823/20140823142450862279.gif等于(     )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823142450878192.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823142450956228.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823142450971210.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823142450987225.gifn(n+1)

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