高中数学代数与函数一数列106
题目内容

已知 http://picflow.koolearn.com/upload/papers/20140824/20140824023051942481.png是等差数列, http://picflow.koolearn.com/upload/papers/20140824/20140824023051957388.png为其前 http://picflow.koolearn.com/upload/papers/20140824/20140824023051973297.png项和,若 http://picflow.koolearn.com/upload/papers/20140824/20140824023051989571.png,O为坐标原点,点 http://picflow.koolearn.com/upload/papers/20140824/20140824023052004652.png,点 http://picflow.koolearn.com/upload/papers/20140824/20140824023052035881.png,则 http://picflow.koolearn.com/upload/papers/20140824/20140824023052051549.png(  )

2021-09-28

A.-2014

B.2014

C.-3973

D.1000

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