已知等比数列
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dce5581f9f7a073dae44d2ded44ef9f2.png)
(1)若
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d06ef951f417999eb27a611d385c1a31.png)
________________ ;
(2)若
,则当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8136f1ad5af952ddf39ba55efefd9180.png)
________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/606e55241a2e145d54849129b8ffd20f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dce5581f9f7a073dae44d2ded44ef9f2.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5577f21b43b95ffc3e26dbc58400953a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d06ef951f417999eb27a611d385c1a31.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c963172eaae4b8c5e5aea03b6ac7ee04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e167b43045b3297248e334c41c621b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8136f1ad5af952ddf39ba55efefd9180.png)
2018高二上·全国·专题练习 查看更多[3]
(已下线)2018年9月19日 《每日一题》人教必修5-等比数列的性质(已下线)2019年9月18日 《每日一题》必修5—— 等比数列的性质(已下线)专题7 等比数列的性质 微点1 等比数列项的性质
更新时间:2018-10-10 09:17:20
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【推荐1】对于两个均不等于1的正数a和b,定义:
设
,
,且
,则
的值是_____ .
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【推荐2】一科研人员研究
两种菌.已知在任何时刻
两种菌的个数乘积为定值
.为便于研究,科研人员用
来记录
菌个数的资料,其中
为
菌的个数,则下列说法:①
;②若今天的
值比昨天的
值增加
,则今天的
菌个数比昨天的
菌个数多了
个;③假设科研人员将
菌的个数控制为
万个,则此时
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解题方法
【推荐1】已知等比数列
的公比为
,其前
项的积为
,且满足
,
,
,则下列命题正确的有__________ .(填序号)
(1)
;
(2)
;
(3)
的值是
中最大的;
(4)使
成立的最大正整数数
的值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8141d87fb02b08c88b0c9f27f839a7d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c31e51862560624b26e3335883feea2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e910dce77c2936b9a6b11b9aacd8e44.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ca664b1e82da6f50064a76fe118aa80.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74234229e61febcbc33e3ce5b8cdc96c.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00136ab4fd69ba9c28b47cd38442dc3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(4)使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ae93e401b499b0e39f251279b5663c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b26cfaedb1ad7aee599ae02b4ebe7135.png)
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【推荐2】已知
是等比数列,对
恒成立,且
,
则
等于_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0659932709ba701af881f08b7b3a7301.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce7453c201c33abe5cdf9fce2947572.png)
则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20403bc1f743184e20060790687d55ac.png)
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