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等差数列 http://picflow.koolearn.com/upload/papers/20140824/20140824015334882480.png的公差 http://picflow.koolearn.com/upload/papers/20140824/20140824015334913430.png,且 http://picflow.koolearn.com/upload/papers/20140824/20140824015334929493.png,则该数列的前 http://picflow.koolearn.com/upload/papers/20140824/20140824015334945297.png项和取得最大值时, http://picflow.koolearn.com/upload/papers/20140824/20140824015334960315.png

发布时间:2021-09-28

A.6

B.7

C.6或7

D.7或8

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