高中数学代数与函数一数列106
题目内容

设等差数列{ http://picflow.koolearn.com/upload/papers/20140824/20140824022501768348.png}的前n项和为 http://picflow.koolearn.com/upload/papers/20140824/20140824022501799328.png,已知 http://picflow.koolearn.com/upload/papers/20140824/20140824022501815315.png=-2012, http://picflow.koolearn.com/upload/papers/20140824/20140824022501830869.png=2,则 http://picflow.koolearn.com/upload/papers/20140824/20140824022501846452.png=(    )

2021-09-28

A.-2013

B.2013

C.-2012

D.2012

题目答案

试卷相关题目

最新试卷
热门试卷

长理培训客户端 资讯,试题,视频一手掌握

去 App Store 免费下载 iOS 客户端