若数列
的前
项和
满足
,则
( )
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A.32 | B.![]() | C.![]() | D.![]() |
更新时间:2021-01-31 21:20:07
|
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A.充分不必要 | B.必要不充分 |
C.充要 | D.既不充分也不必要 |
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