20.已知正數(shù)數(shù)列的前項(xiàng)和滿足. 查看更多

 

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()已知正數(shù)數(shù)列的前項(xiàng)和為,

,數(shù)列滿足.(Ⅰ)求數(shù)列的通項(xiàng)公式; (Ⅱ)當(dāng)時(shí),,求數(shù)列的前項(xiàng)和

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已知正數(shù)數(shù)列的前項(xiàng)和與通項(xiàng)滿足,求

 

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已知正數(shù)數(shù)列的前項(xiàng)和為,且對(duì)任意的正整數(shù)滿足.

(Ⅰ)求數(shù)列的通項(xiàng)公式;

(Ⅱ)設(shè),求數(shù)列的前項(xiàng)和.

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已知正數(shù)數(shù)列的前項(xiàng)和為,且對(duì)任意的正整數(shù)滿足.

(Ⅰ)求數(shù)列的通項(xiàng)公式;

(Ⅱ)設(shè),求數(shù)列的前項(xiàng)和.

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(本題滿分14分)已知正數(shù)數(shù)列的前項(xiàng)和為,且對(duì)任意的正整數(shù)滿足.

(Ⅰ)求數(shù)列的通項(xiàng)公式;

(Ⅱ)設(shè),求數(shù)列的前項(xiàng)和.

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