1 . 在
中,
的平分线交
于
,且
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f651249b15d564a4b426d293b545b37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/c393b02a-3e00-4aa9-ba8b-a4cbd876820c.png?resizew=136)
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2 . 如图,
是以
为直径的固定的半圆弧,
是经过点
及
上另一个定点
的定圆,且
的圆心位于
内.设
是
的弧
(不含端点)上的动点,
,
是
上的两个动点,满足:
在线段
上,
,
位于直线
的异侧,且
.记
的外心为
.证明:
(1)点
在
的外接圆上;
(2)
为定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8059a935a2325a9e7abbcbf56aa167f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f4ee45d9bfe4281d0501e0729b7ba6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96645a3530e72d5d733d2c72147d340.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/17/e92a7992-52b6-406b-8d62-a94eb3bfd8ee.png?resizew=177)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9705bb0595ad62312a40b99e4d31139e.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
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3 . 设复数
(i为虚数单位),若正整数
满足
,则
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5972e7b1bce9868064384254b44ae7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cb86aa710303d50b4867057171a5933.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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解题方法
4 . 在立方体中放入9个球,一个与立方体6个面都相切,其余8个相等的球都与这个球及立方体的三个面相切,已知8个相等的球的半径都为
,则立方体的体积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47cfe4e08c06bde245e58aa22485044c.png)
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5 . 设z为复数,若方程
表示一条圆锥曲线,则此曲线的离心率![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f9b19dfc40f5ac92d489480c488a211.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba0faf86eda36bf50a0725d1d52722a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f9b19dfc40f5ac92d489480c488a211.png)
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6 . 已知椭圆
的左右焦点为
,点P在直线
上,当
取最大值时,
的值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ec15606e83f0193fae69964aaec745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b799737e84f54908b8700fbaf1f96a80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c18718d9550e3a2bc579d41f6de831.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a436c08117d943c2e3b32cc68b6147b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f24706bfc6eaa501211e3c0d4e184805.png)
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7 . 设
,且
,若
,则
的值___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa0c5e972dd30f59425963ef568b5e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc3ffc0affbb5311cffa81936004a8e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/292e6cef540885a0b3f6f98f3d716a80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/853c0c03aa9086e9e6c53eb2af7f2d7d.png)
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8 . 已知二面角
的平面角为
,A,D为直线l上的两点,射线
在平面
内,射线
在平面
内,已知
,则
等于___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc4e18d1ac4f5119845b3ee4e8fd3a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0860834d28d02fd66a5235671348b92b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07c9121cede0ee0562e23b8a26b34616.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3217fa687c8a339e86fc482c826e2edf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a096cc7ad0625b68858eb7549986d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9520604dc21bc8d5a6f4659725cecaec.png)
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9 . 直角三角形
的三个顶点分别在等边三角形
的边
上,且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839ce94689e556c5d3bbad67071a64de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd8be9911089f6b0c48d50ac2eaf2091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5915a17fae38af0b2ef9ed98a81ec7ad.png)
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10 . (1)若实数x,y,z满足
,证明:
;
(2)若2023个实数
满足
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b77bd83db721327f2875fb9ce218f797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f921846cfd2491c21fbe42fd29fd80.png)
(2)若2023个实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52011d2f4946b2ddd070bb20796a069d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca7909872111d29739539041cb524eaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4507435d75954f4991f50ad1376e5cb3.png)
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