已知數(shù)列
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是等差數(shù)列,且
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,則
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的值為( )
試題分析:
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,所以
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科目:高中數(shù)學
來源:不詳
題型:解答題
已知數(shù)列
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,
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分別為等比,等差數(shù)列,數(shù)列

的前n項和為
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,且
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,
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,
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成等差數(shù)列,
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,數(shù)列
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中,

,
(Ⅰ)求數(shù)列
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,

的通項公式;
(Ⅱ)若數(shù)列

的前n項和為
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,求滿足不等式
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的最小正整數(shù)
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。
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設(shè)等差數(shù)列
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的前
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項和為

,且
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,則使得
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的最小的
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和
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分別為等差數(shù)列與等比數(shù)列,且
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已知
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滿足
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