高中数学代数与函数一数列106
题目内容

已知等差数列 http://picflow.koolearn.com/upload/papers/20140824/20140824014838684470.png的公差为2，若 http://picflow.koolearn.com/upload/papers/20140824/20140824014838700490.png成等比数列，则 http://picflow.koolearn.com/upload/papers/20140824/20140824014838716348.png=（   ）

2021-09-28

A.http://picflow.koolearn.com/upload/papers/20140824/20140824014838747259.png

B.http://picflow.koolearn.com/upload/papers/20140824/20140824014838762305.png

C.http://picflow.koolearn.com/upload/papers/20140824/20140824014838794322.png

D.http://picflow.koolearn.com/upload/papers/20140824/20140824014838809318.png

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