若
是等比数列,
是互不相等的正整数,则有正确的结论:
.类比上述性质,相应地,若
是等差数列,
是互不相等的正整数,则有正确的结论:_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b511bcbe94aa484c0a067891fbf7968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b33079c8fb634c6e98eb36b441a461.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b511bcbe94aa484c0a067891fbf7968.png)
12-13高三上·浙江台州·期末 查看更多[4]
(已下线)2012届浙江省台州市高三上学期期末文科数学试卷(已下线)2013届江西省师大附中、临川一中高三8月联考文科数学试卷(已下线)2013届浙江省慈溪中学高三第一次月考文科数学试卷(已下线)2012-2013学年江苏省东台市唐洋中学高二下学期期中考试理科数学试卷
更新时间:2016-12-01 15:09:05
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【推荐1】已知等差数列
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,且
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![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004381577216/1573004387508224/STEM/986c57ffc9634efe8cdfcfd4d9436b11.png?resizew=29)
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【推荐2】已知等差数列
为递增数列,若
,
,则数列
的公差d的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1f97a3327ca86ac7178b2c7f44b9fae.png)
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【推荐1】已知等比数列
的公比为q,且
,
,则q的取值范围为______ ;能使不等式
成立的最大正整数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1381f0937c6052ce088e0eaee7df4880.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
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【推荐2】在等差数列
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,
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【推荐1】将数列
中的所有项排成如下数阵:其中每一行项数是上一行项数的2倍,且从第二行起每一行均构成公比为2的等比数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd71bc7e6668f90f259ad0b06dd60c2.png)
,
,
,
,
,
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,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5bbae9353140c2235610852d04a9a3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dab783880d7aabc422916886630fc576.png)
记数阵中的第1列
,
,
,
构成的数列为
,
为数列
的前
项和,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414187fca31df508dbf88d7f2bb83662.png)
______ ,
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
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记数阵中的第1列
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
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【推荐2】直线
与直线
相交于点
.直线
与
轴交于点
,过点
作
轴的垂线交直线
于点
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作
轴的垂线交直线
于点
,过点
作
轴的垂线交直线
于点
,
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、
、
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,
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的横坐标构成数列
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_______ 时,
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_______ 时,
为等比数列.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
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