高中数学代数与函数一其他练习题5
题目内容

http://picflow.koolearn.com/upload/papers/g02/20120830/201208302132112441649.png的展开式中第三项的系数是  

2021-07-12

A.http://picflow.koolearn.com/upload/papers/g02/20120830/20120830213211461933.png

B.http://picflow.koolearn.com/upload/papers/g02/20120830/20120830213211609854.png

C.15

D.http://picflow.koolearn.com/upload/papers/g02/20120830/20120830213211752790.png

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