首页 › 其它 › 设数列{an}的首项a1=32，前n项和为Sn，且满足2an+1+Sn=3（n∈N*）．（Ⅰ）求a2及an；（Ⅱ）求证：anSn≤94．

meili 发表于 2022-10-27 14:42:32

设数列{an}的首项a1=32，前n项和为Sn，且满足2an+1+Sn=3（n∈N*）．（Ⅰ）求a2及an；（Ⅱ）求证：anSn≤94．

<p>问题：设数列{an}的首项a1=32，前n项和为Sn，且满足2an+1+Sn=3（n∈N*）．（Ⅰ）求a2及an；（Ⅱ）求证：anSn≤94．
<p>答案：↓↓↓<p class="nav-title mt10" style="border-top:1px solid #ccc;padding-top: 10px;">贺蕾的回答：<div class="content-b">网友采纳　　（Ⅰ）由2an+1+Sn=3，得2a2+a1=3，　　又a

查看完整版本: 设数列{an}的首项a1=32，前n项和为Sn，且满足2an+1+Sn=3（n∈N*）．（Ⅰ）求a2及an；（Ⅱ）求证：anSn≤94．