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解题方法
1 . 已知四面体
的体积是
,棱
的长是c,
和
的面积分别是
和
.设平面
和平面
的夹角为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e4e9ae7d5036d60df642e68b376e3b8.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31f560e7cf413db8a53567770545e54c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e4e9ae7d5036d60df642e68b376e3b8.png)
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2 . 在平面直角坐标系中,已知动点
和
,定点
和
,若
,且
的周长恒为16,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d03fa28c117649b0fdfe17eed7b583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c6e4418e49a475db5b4a95bc33b3836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44da9d962a4358d41f9cbad9371c9987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/149b1308aba39bcb147392e6c01ebdcf.png)
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解题方法
3 . 由三角形内心的定义可得:若点
为
内心,则存在实数
,使得
.在
中,
,若点
为
内心,且满足
,则
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdcc0b70816744ef6fadb8dafff52e2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acdd2de4d9b215c8f5b33d01828c7e98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8954ac84d5a64358d2876a62f2a439b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
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4 . 如图,一块正三棱柱体形木料的上底面有一点P,经过点P在上底面上画一条直线与
垂直,写出作该直线的方法:_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0ff310aabd2282b539537ebed3f788.png)
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2024-06-08更新
|
84次组卷
|
2卷引用:安徽省金榜教育2023-2024学年高一下学期5月阶段性大联考数学试题
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5 . 对于函数
,当该函数恰有两个零点时,设两个零点中最大值为
,当该函数恰有四个零点时,设这四个零点中最大值为
,求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95dcf476d5a8a46b481c51e431a845a7.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e25f7bb985c7a9886b4ae509124ef51b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95dcf476d5a8a46b481c51e431a845a7.png)
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2024-06-08更新
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266次组卷
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2卷引用:安徽省皖北五校联盟2024届高三第二次联考数学试卷
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解题方法
6 . 在
中,
,
,
,则以B、C为焦点,且过A点的双曲线的离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f186ea827f7becafd1ac4955e22c6812.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59bb026fd5c811c41d199afe93227b53.png)
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2024-06-08更新
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2卷引用:安徽省级示范高中培优联盟2023-2024学年高二下学期春季联赛数学试题
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7 . 已知抛物线
的焦点为
,半径为6的圆
过坐标原点
以及
,且与该抛物线的准线
相切,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
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3卷引用:安徽省合肥市第一中学2024届高三下学期三模数学试题
8 . 已知在正三棱台
中,
分别为棱
的中点,平面
、平面
与平面
交于点
.记
和
分别表示三棱锥
和三棱锥
的体积,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e68300e9ff6b6ea7943bdd2b3658b2c.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8dff0b92d9c79e26602bd28455d705a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1921b3559a5f73426f0d78e401ecc75b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4764374bd2fb78e59cd0b283637baeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63055a5d6916f99d07fede49120753f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d39e8a65bdb732cea1eef3820e522f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e68300e9ff6b6ea7943bdd2b3658b2c.png)
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9 . 化简![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbeee29a83e92ba7d4e6b9694ef11be5.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbeee29a83e92ba7d4e6b9694ef11be5.png)
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10 . 第九届亚洲冬季运动会(简称亚冬会)将于2025年2月7日至2月14日在中国冰雪名城哈尔滨举行,若将6名大学生分配到亚冬会5个分会场进行引导服务,每名大学生只分配到1个分会场,且每个分会场至少分配1名大学生,则不同的分配方案的种数为__________ .(用数字作答)
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