高中数学代数与函数一数列106
题目内容

已知数列 http://picflow.koolearn.com/upload/papers/20140824/20140824020859964456.png为等差数列,且 http://picflow.koolearn.com/upload/papers/20140824/20140824020859979546.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824020859995432.png,则公差 http://picflow.koolearn.com/upload/papers/20140824/20140824020900011338.png (     )

2021-09-28

A.

B.-http://picflow.koolearn.com/upload/papers/20140824/20140824020900026338.png

C.http://picflow.koolearn.com/upload/papers/20140824/20140824020900026338.png

D.

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