双曲线
=1(b∈N)的两个焦点
、
,
为双曲线上一点,
成等比数列,则
=_____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6d6a03eff6b067a796e14cf5f0d3da6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2011/1/20/1576733293920256/1576733404979200/STEM/05c0773e763f4732a2d1c66e09ffa6f7.png?resizew=161)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a881309775c3b6a9f4ed408838666342.png)
11-12高三上·辽宁锦州·期末 查看更多[1]
(已下线)2011年辽宁省锦州市高三第一学期末理科数学卷
更新时间:2016-12-10 02:15:14
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填空题-单空题
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适中
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解题方法
【推荐1】已知等比数列
的公比为
,它的前
项积为
,且满足
,
,给出以下命题:①
;②
;③
为
的最大值.其中正确命题的序号为______ .
![](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/50264d5cb22067b076fe3e2376d39f89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b4a288ed2eabfaf91963eb54bea320.png)
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名校
【推荐2】若数列
为等差数列,
为等比数列,且满足:
,
,函数
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0f67ecc63958183b70e106534d38b5.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e58b771199b74cf265e162a8c3f9df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180a92df4367f5d8d784af0f919c60aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b923078510697d5f7f9ea392eb76dd9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0f67ecc63958183b70e106534d38b5.png)
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【推荐1】以下关于圆锥曲线的命题中
①设
是两个定点,
为非零常数,若
,则动点
的轨迹为双曲线的一支;②过定圆
上一定点
作圆的动弦
,
为坐标原点,若
,则动点
的轨迹为椭圆;③方程
的两根可分别作为椭圆和双曲线的离心率;④双曲线
与椭圆
有相同的焦点.
其中真命题的序号是_______ .
①设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b65693539fa6c3be5133e35fb0d632e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef83ed4cbc377b4528854130aae5f3de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67f9da93ffb16e3e15db5eb0b7a3618d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2071ddef6f918db272ccdcaec59b205c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356cef488f3c81c5822a863a3f85c227.png)
其中真命题的序号是
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解题方法
【推荐2】已知双曲线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
的左、右焦点分别为
,过
的直线与双曲线的左支交于
两点,连接
.(1)
为定值;(2)若
轴,
为等边三角形,则双曲线C的离心率为
;(3)
的内切圆与
切于点
.则上述说法正确的有____ .(填写所有正确说法的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ec7fa23be9cbe9a50607ea6bc8a4ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8294e87df18d712bc134a3ca2a716c6a.png)
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