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已知数列{ http://picflow.koolearn.com/upload/papers/20140824/20140824022307482348.png}是公差为3的等差数列,且 http://picflow.koolearn.com/upload/papers/20140824/20140824022307498487.png成等比数列,则 http://picflow.koolearn.com/upload/papers/20140824/20140824022307513367.png等于(     )

发布时间:2021-09-28

A.30

B.27

C.24

D.33

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