1 . 已知椭圆
的两焦点分别为
的离心率为
上有三点
,直线
分别过
的周长为8.
(1)求
的方程;
(2)①若
,求
的面积;
②证明:当
面积最大时,
必定经过
的某个顶点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/704bfc280d817fb77006ee98d4d7e5f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99276d856410431e6ed0b59fc27e5264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0c8c8746a97d79afa729753ef8b38ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2304324f76e8efaaec4fa0c6b677879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdba598caa59b8a2a68f6aed5de15525.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28c23cfc5eb8416cdf74c2da06e5656.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffd5d363ebeaa6de0ff830742643db4.png)
②证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffd5d363ebeaa6de0ff830742643db4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffd5d363ebeaa6de0ff830742643db4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
2023-12-17更新
|
1300次组卷
|
4卷引用:模块六 全真模拟篇 拔高1 期末终极研习室(2023-2024学年第一学期)高三
(已下线)模块六 全真模拟篇 拔高1 期末终极研习室(2023-2024学年第一学期)高三江苏省扬州市扬州中学2024届新高考一卷数学模拟测试一福建省厦门第一中学2023-2024学年高二上学期十二月月考数学试卷福建省泉州市实验中学2023-2024学年高二上学期12月月考数学试题
2 . 已知平面直角坐标系xOy,在x轴的正半轴上,依次取点
,
,
,
,并在第一象限内的抛物线
上依次取点
,
,
,
,
,使得
都为等边三角形,其中
为坐标原点,设第n个三角形的边长为
.
⑴求
,
,并猜想
不要求证明);
⑵令
,记
为数列
中落在区间
内的项的个数,设数列
的前m项和为
,试问是否存在实数
,使得
对任意
恒成立?若存在,求出
的取值范围;若不存在,说明理由;
⑶已知数列
满足:
,数列
满足:
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b56e44e4f0424a2b7a45567120a2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66824213dba38905314b869af8768ef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d5ad148899b68076f540fc0d2511f0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2857fac4963b129d99e79dcb3e13d295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417b7ede44985b47d255e0bc88e194d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a48d38e3dca06d59fae42842976b36fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7356ec98b600ece41f3a6b4bc26a7d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38fcec7af3520884b173b29bda6c657a.png)
⑴求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce6155e181e21ce56ea658b70f8af17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d55ef0d1b7ea88d92fd6e1ecebb5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa18879b6eddb71fe9151695583774f.png)
⑵令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828f975ac237b5c42cc7b679bf8ff55e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/915daa6700ee4507fd074b085703522f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f4c8aec93c77bf9585f6d980f8a09fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a03df1834d8b96da4bb3bdf18e49b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1752474698cd5466dd180df0a00ba9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a7f386bd061c3bd6a75653c02b39595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a949b947e9961d4d68bfeb4e24ef40f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
⑶已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7063f45048c843c17160e0b75bf40d12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c74d0ecf30e4e355a41242914e5102b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f020b576635c21d12be29fafe90e0b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6afd6a67670ee1f8c29f326de6db293.png)
您最近一年使用:0次
2019-01-16更新
|
1707次组卷
|
4卷引用:上海市浦东新区2018-2019学年高三上学期期末数学试题
上海市浦东新区2018-2019学年高三上学期期末数学试题上海市浦东新区2019届高三一模数学试题(已下线)第23讲 证明数列不等式-2022年新高考数学二轮专题突破精练(已下线)专题10 数列通项公式的求法 微点10 数列通项公式的求法综合训练