高中数学代数与函数一数列106
题目内容

已知等差数列 http://picflow.koolearn.com/upload/papers/20140824/20140824023431387456.png的前 http://picflow.koolearn.com/upload/papers/20140824/20140824023431387297.png项和为 http://picflow.koolearn.com/upload/papers/20140824/20140824023431403388.png，若 http://picflow.koolearn.com/upload/papers/20140824/20140824023431418505.png， http://picflow.koolearn.com/upload/papers/20140824/20140824023431434522.png，则 http://picflow.koolearn.com/upload/papers/20140824/20140824023431450399.png为（     ）

2021-09-28

A.http://picflow.koolearn.com/upload/papers/20140824/20140824023431450291.png

B.http://picflow.koolearn.com/upload/papers/20140824/20140824023431465350.png

C.http://picflow.koolearn.com/upload/papers/20140824/20140824023431590352.png

D.http://picflow.koolearn.com/upload/papers/20140824/20140824023431699332.png

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