等差数列中,,,则A.64              B.31             C.16       ...

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问题详情:

等差数列等差数列中,,,则A.64              B.31             C.16       ...中,等差数列中,,,则A.64              B.31             C.16       ... 第2张等差数列中,,,则A.64              B.31             C.16       ... 第3张,则等差数列中,,,则A.64              B.31             C.16       ... 第4张

A.64                B.31               C.16               D.15

【回答】

D

知识点:数列

题型:选择题

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