1:1  08-24[数学]丁老师教你巧妙解答数列求和问题
讲解人：丁益祥，全国著名数学特级教师，北京市陈经纶中学教学组组长，首席数学教师。推荐理由：数列求多项式和找不到切入点？丁老师教你根据递推关系的结构形式，做个别实验，分析探求出数列的本质特点，迅速解决问题。 题面：（来源:2012全国课标卷） 数列{an}满足an+1+(-1)^n*an=2n-1，则{an}的前60项和为（ ）． A．3690 B．3660 C．1845 D．1830 本部分内容设定了隐藏,需要回复后才能看到
 跟帖分享你的答案，即刻看到正确答案和解析！
这道题的解答思路非常巧妙，需要同学们具备足够的抽象概括能力。你成功做出了吗？
[每周一星] http://www.jiandan100.cn/bbs/upload/viewthread.php?tid=651252& <--点击进入- ----------------------------------------------------------------------------------------------------------------------------------------------------------------- 查看更多本年级每周一题，请点击： http://www.jiandan100.cn/bbs/upload/forumdisplay.php?fid=386& 浏览本期“简单学习电子周报”完整目录：http://www.jiandan100.cn/bbs/upload/viewthread.php?tid=651216 |
|
|
![20天大作战[2015]](https://bbs.jd100.com/attachment/medal/cec543c13f7ea1b.jpg "20天大作战[2015]"){kind=small}
![20天大作战[2014]](https://bbs.jd100.com/attachment/medal/465e7ccd53045d5.png "20天大作战[2014]"){kind=small}
![28天勇士[春]](https://bbs.jd100.com/attachment/medal/13d5b846139de25.png "28天勇士[春]"){kind=small}
![21天勇士[春]](https://bbs.jd100.com/attachment/medal/557cbed59379b9b.png "21天勇士[春]"){kind=small}
![14天勇士[春]](https://bbs.jd100.com/attachment/medal/0a2a8be87813938.png "14天勇士[春]"){kind=small}
![7天勇士[春]](https://bbs.jd100.com/attachment/medal/7b734d35544b9d3.png "7天勇士[春]"){kind=small}
![28天勇士[寒假]](https://bbs.jd100.com/attachment/medal/f7cb21a2bdf0790.jpg "28天勇士[寒假]"){kind=small}
![21天勇士[寒]](https://bbs.jd100.com/attachment/medal/cda474e823b15b8.jpg "21天勇士[寒]"){kind=small}
![14天勇士[寒]](https://bbs.jd100.com/attachment/medal/9aacf8cc0ea8134.jpg "14天勇士[寒]"){kind=small}
![7天勇士[寒]](https://bbs.jd100.com/attachment/medal/3ae915c994fd934.jpg "7天勇士[寒]"){kind=small}
![勇不止步[春]](https://bbs.jd100.com/attachment/medal/f783eb36b20a4e2.jpg "勇不止步[春]"){kind=small}
![勇不止步[夏]](https://bbs.jd100.com/attachment/medal/d81a441ef64b068.jpg "勇不止步[夏]"){kind=small}
![7天勇士[暑]](https://bbs.jd100.com/attachment/medal/8ad8dbd20210831.jpg "7天勇士[暑]"){kind=small}
![14天勇士[暑]](https://bbs.jd100.com/attachment/medal/ccbd3226d78250f.jpg "14天勇士[暑]"){kind=small}
![21天勇士[暑]](https://bbs.jd100.com/attachment/medal/63814ff34bb2a24.jpg "21天勇士[暑]"){kind=small}
![28天勇士[暑]](https://bbs.jd100.com/attachment/medal/e87f38d2f0151f0.jpg "28天勇士[暑]"){kind=small}
![35天勇士[暑]](https://bbs.jd100.com/attachment/medal/bdf9a316a9af31b.jpg "35天勇士[暑]"){kind=small}
![42天勇士[暑]](https://bbs.jd100.com/attachment/medal/a0f25f6f396ba8a.jpg "42天勇士[暑]"){kind=small}
![49天勇士[暑]](https://bbs.jd100.com/attachment/medal/611dbeb8ac74943.jpg "49天勇士[暑]"){kind=small}
|
沙发#
发布于：2017-08-21 10:08
 |
|
|
|
板凳#
发布于：2017-03-26 22:45
 D |
|
|
地板#
发布于：2017-03-26 12:02
sqqqqqq
|
|
|
4楼#
发布于：2017-03-05 19:02
什么课有丁老师
|
|
|
5楼#
发布于：2017-01-30 22:26
分类讨论就好啊
|
|
|
|
6楼#
发布于：2015-08-25 19:56
 |
|
|
|
7楼#
发布于：2015-08-24 19:15
{an}的前60项和为3660
|
|
|
8楼#
发布于：2015-08-15 11:47
D D
|
|
|
9楼#
发布于：2014-12-01 12:56
DDDDDDDDDDDDD
|
|
上一页
下一页
