1 . 设曲线
所围成的封闭区域为D.
(1)求区域D的面积;
(2)设过点
的直线与曲线C交于两点P、Q,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9191145159186430bdcc16ba4b9d69.png)
(1)求区域D的面积;
(2)设过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439acc9639ef88d6ef396edb53172dd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82358b724051b032c7ec734a226ae84.png)
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2002高三·湖南·竞赛
名校
2 . 设关于 x 的一元二次方程
的两个根为 α、β(α < β).
(1))若 x1、x2 为区间[ α, β] 上的两个不同的点,求证:
;
(2)设
,
在区间[ α, β] 上的最大值和最小值分别为
和
,
.求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58f247254d25c597e12c9f400820274f.png)
(1))若 x1、x2 为区间[ α, β] 上的两个不同的点,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/385836628973f021654e20b9997b17d4.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ff175b22e5ef641b512f609318d40bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff2d8bdc2cded003dbec9822d1bb9e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce86efd98b97c710761f8aa6983f25ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1759ff4cca81d97af125facee38e2e1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a82a1224e47f31ecdfffd328d5a3ab6d.png)
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2018-12-15更新
|
375次组卷
|
5卷引用:2002年湖南省高中数学奥林匹克
3 . 设函数
的定义域为
,当
时,
,且对任意的实数
有
成立.数列
满足
且
.
(1)求
的值;
(2)若不等式
对一切
均成立,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db40d5295942e85ec07a3728c7ad308d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db053b743c6ecbf87eb04fd8041b4c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b9308bb553e88185db6f98a757f0aab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bddb3abe79d0134c73ed759fee46c1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22c66aef240dbdef140fabec55e272c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97fadefc1cce6ca6de518e055357efb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82c5ce2fa62e8f8643ee0aace4265802.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec0c85a2e2f9e0c024b83f0deb85bf5e.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e72880c45526249190a1906fefba9f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8172796a9473b3c17ef6429961203796.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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4 . 设
均取正实数,且
.求三元函数
的最小值,并给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3fb0c9c7e30bbc0ec8c3521577ee4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd24c686fbaaa68705d654b880481ffe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c051c8c5faed37949c0c8a91e2081728.png)
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5 . 在正方形
中,
为边
上一点(点
与顶点不重合). 延长
,与
的延长线交于点
. 设
、
、
的内切圆半径分别为
、
、
.
(1)证明:
,并指出点
在什么位置时,等号成立;
(2)若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b17f20c25bb16153b5f2d25062ed7a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba70863115b0947e98214a7b2512167d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2858005b9ae89ae080d83dcc13cf8e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3e95410f3b4fcb0cba425b521d1f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2cb48c0a69b8c420c0b64b2bfa1ef7.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcbc7a469b1e21f1c8f3283d3893af68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e216c23df178cd616a2c2dd84648e9f5.png)
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