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已知 http://picflow.koolearn.com/upload/papers/20140824/20140824021800598456.png为等差数列,其前 http://picflow.koolearn.com/upload/papers/20140824/20140824021800614297.png项和为 http://picflow.koolearn.com/upload/papers/20140824/20140824021800630388.png,若 http://picflow.koolearn.com/upload/papers/20140824/20140824021800645459.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824021800661507.png,则公差 http://picflow.koolearn.com/upload/papers/20140824/20140824021800676321.png等于(   )

发布时间:2021-09-28

A.http://picflow.koolearn.com/upload/papers/20140824/20140824021800692206.png

B.http://picflow.koolearn.com/upload/papers/20140824/20140824021800708356.png

C.http://picflow.koolearn.com/upload/papers/20140824/20140824021800723291.png

D.http://picflow.koolearn.com/upload/papers/20140824/20140824021800739287.png

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