高中数学代数与函数一数列106
题目内容

设等差数列 http://picflow.koolearn.com/upload/papers/20140824/20140824021422385481.png的前 http://picflow.koolearn.com/upload/papers/20140824/20140824021422401297.png项和为 http://picflow.koolearn.com/upload/papers/20140824/20140824021422416388.png， http://picflow.koolearn.com/upload/papers/20140824/20140824021422416348.png、 http://picflow.koolearn.com/upload/papers/20140824/20140824021422432346.png是方程 http://picflow.koolearn.com/upload/papers/20140824/20140824021422448628.png的两个根， http://picflow.koolearn.com/upload/papers/20140824/20140824021422463395.png（    ）

2021-09-28

A.http://picflow.koolearn.com/upload/papers/20140824/20140824021422479413.png

B.http://picflow.koolearn.com/upload/papers/20140824/20140824021422494259.png

C.http://picflow.koolearn.com/upload/papers/20140824/20140824021422510433.png

D.http://picflow.koolearn.com/upload/papers/20140824/20140824021422526275.png

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