已知两个等差数列
和
的前
项和分别为
和
,且
,则使得
为整数的正整数
的个数是___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e01d212a3992caffe4f26c9efb731fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f29e31f89a2d0815ba39715d55e27ef8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
9-10高一下·浙江宁波·期中 查看更多[9]
(已下线)2010年浙江省慈溪中学高一下学期期中考试数学(5-7班)(已下线)2010年浙江省慈溪中学高一下学期期中考试数学(8-13班)(已下线)2013-2014学年江西省吉安一中高一下学期第一次段考数学试卷2016-2017学年安徽六安一中高二理上国庆作业数学试卷【全国百强校】贵州省南白中学(遵义县一中)2018-2019学年高一下学期第一次联考数学试题山东省聊城市文苑中学2018-2019学年高二上学期10月月考数学试题上海市七宝中学2016-2017学年高二上学期开学考试数学试题(已下线)考点18 等差数列(练习)-2021年高考数学复习一轮复习笔记(已下线)第二节 等差数列(讲)
更新时间:2019-10-10 16:32:12
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【知识点】 两个等差数列的前n项和之比问题
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【推荐1】若两个等差数列
与
的前
项和分别为
与
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671cc052e2797ae47343bacfe340e21.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
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【推荐2】已知两个等差数列
的前
项和分别记为
,
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c9419b0093fcc306f187a11a46d1fe1.png)
__________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba6631f75636aeafa648d99729aa5b6.png)
______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e567d7e9761951a266953c8d5042ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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