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http://picflow.koolearn.com/upload/papers/20140823/20140823121701233463.gif把二项式定理展开,展开式的第 http://picflow.koolearn.com/upload/papers/20140823/20140823121701265200.gif项的系数是(     )

发布时间:2021-07-12

A.http://picflow.koolearn.com/upload/papers/20140823/20140823121701280236.gif

B.http://picflow.koolearn.com/upload/papers/20140823/20140823121701296242.gif

C.http://picflow.koolearn.com/upload/papers/20140823/20140823121701343342.gif

D.http://picflow.koolearn.com/upload/papers/20140823/20140823121701358340.gif

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