(本題滿分12分)已知數列
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滿足
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,且
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,
(1)求
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的值;猜想
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的表達式并用數學歸納法證明
(2)求
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,
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�。卜�
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�。撤帧 ∽C明略........8分
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......12分
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科目:高中數學
來源:不詳
題型:解答題
(本小題滿分8分)
數列
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滿足
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。
(Ⅰ)計算
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,并由此猜想通項公式

;
(Ⅱ)用數學歸納法證明(Ⅰ)中的猜想。
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科目:高中數學
來源:不詳
題型:解答題
已知數列
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滿足
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,
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(
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且
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)
(Ⅰ)證明數列
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是常數列;
(Ⅱ)求數列

的通項公式;
(Ⅲ)當
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時,求數列
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的前
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項和.
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科目:高中數學
來源:不詳
題型:填空題
設等比數列
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的公比為q,前n項和為S
n,若S
n+1,S
n,S
n+2成等差數列,則q
的值為
.
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科目:高中數學
來源:不詳
題型:單選題
已知等差數列{
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},滿足
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,則此數列的前10項的和
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( )
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科目:高中數學
來源:不詳
題型:填空題
已知數列
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滿足
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,且對任意的正整數
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都有
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,若數列
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的前
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項和為
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,則
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=
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