高中数学代数与函数一数列106
题目内容

等差数列 http://picflow.koolearn.com/upload/papers/20140824/20140824021253262477.png的前 http://picflow.koolearn.com/upload/papers/20140824/20140824021253278297.png项和为 http://picflow.koolearn.com/upload/papers/20140824/20140824021253278388.png，公差为 http://picflow.koolearn.com/upload/papers/20140824/20140824021253293321.png，已知 http://picflow.koolearn.com/upload/papers/20140824/20140824021253309974.png， http://picflow.koolearn.com/upload/papers/20140824/201408240212533251006.png，则下列结论正确的是（    ）

2021-09-28

A.http://picflow.koolearn.com/upload/papers/20140824/20140824021253340848.png

B.http://picflow.koolearn.com/upload/papers/20140824/20140824021253356858.png

C.http://picflow.koolearn.com/upload/papers/20140824/20140824021253371859.png

D.http://picflow.koolearn.com/upload/papers/20140824/20140824021253387864.png

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