高中数学代数与函数一数列106
题目内容

设 http://picflow.koolearn.com/upload/papers/20140824/20140824015426144345.png是公差不为0的等差数列 http://picflow.koolearn.com/upload/papers/20140824/20140824015426159415.png的前 http://picflow.koolearn.com/upload/papers/20140824/20140824015426175277.png项和，且 http://picflow.koolearn.com/upload/papers/20140824/20140824015426191490.png成等比数列，则 http://picflow.koolearn.com/upload/papers/20140824/20140824015426191421.png等于

2021-09-28

A.

B.

C.3http://picflow.koolearn.com/upload/papers/20140824/20140824015426222168.png

D.

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