高中数学代数与函数一其他练习题10
题目内容

http://picflow.koolearn.com/upload/papers/20140823/20140823122147307431.gif的二项展开式中,第r项的二项式系数为 (   )

2021-07-12

A.http://picflow.koolearn.com/upload/papers/20140823/20140823122147338339.gif

B.http://picflow.koolearn.com/upload/papers/20140823/20140823122147353367.gif

C.http://picflow.koolearn.com/upload/papers/20140823/20140823122147400364.gif

D.http://picflow.koolearn.com/upload/papers/20140823/20140823122147416467.gif

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