名校
解题方法
1 . 在锐角
中,内角A,B,C所对的边分别为a,b,c,满足
.
(1)求证:
;
(2)若
,求a边的范围;
(3)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8e5ce6c55a720a332a08c07f1a89a1.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2264c134952d41fb9bcb90e6c72c83.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9563e5c29f03707996eb761fba29ce21.png)
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2 . 求值
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaa7ab1c7bfffb5028f135eeb8fe4a4d.png)
A.![]() | B.![]() | C.1 | D.![]() |
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解题方法
3 . 中国古代数学著作《九章算术》中,将底面是直角三角形的直三棱柱称之为“堑堵”,将底面为矩形,一条侧棱垂直于底面的四棱锥称之为“阳马”.在如图所示的堑堵
中,
,则阳马
的外接球的体积与表面积之比是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cac2e4804b5efbe1e32540462334f600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895ac202e3507cb633337b41299ad84b.png)
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4 . 函数
的一段图象如图所示.
的解析式及单调递增区间;
(2)求函数
在
上的值域;
(3)若不等式
对
,
上恒成立,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94ed010c883085b3a47f18da045ae56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00d3eabbc41f8bec790969adcf1ce046.png)
(3)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8eef1fd6d04d8cd94001a72c4fbf2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/137c79bfacb1a30d25baf98739b2eb15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0ab04ffcc9868b141e4d3555b32fd44.png)
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解题方法
5 . 已知正六边形ABCDEF的边长为1,点P是其内部一点(包含边界),则
的取值可以为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9148f778ce04136bab5385ac8bad6a9.png)
A.0 | B.![]() | C.![]() | D.3 |
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6 . 函数
(其中
,
,
)的部分图象如图所示,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5e2a383cb47eb87493e86c8c40caf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13378be06b6b01bcad1d261ff14e87cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a61aaa4794ba51dc328aedbbc47c35c.png)
A.函数![]() ![]() |
B.函数![]() ![]() |
C.将函数![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() |
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解题方法
7 . 在条件:①
;②
;③
中任选一个,补充在下面的题目中,并求解.
已知
,且满足条件______.
(1)求
的值;
(2)若
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f99b27b991181271d728cd2f2df78fa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01abbf24cb877b763aea5d8b0200312b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf62b180b404b737623e5eedf2bccee0.png)
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cc9cfe7478a6a861fdbc632936f9522.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4952773d616eba12475a5446ad347bfb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9be2e0a0816bc26d430622d24909ef97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07ae567e9e9ab991baf76be53b70bd18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc4c63a548b91061528aa11058de75.png)
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8 . 在
中,
,
,边
,
上的点
,
满足
,
,
为
中点.
,求实数
,
的值;
(2)若
,求边
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88496e57aafc0e6efdf0890da3ce085e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bded420871e5b9a06dd7d3fe922e5f94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b6f45c3d18483eb3a89f1721a08cc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22318250dc4985774c13739831044a82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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解题方法
9 . 为了丰富同学们的课外实践活动,某中学拟对生物实践基地(△ABC区域)进行分区改造.△BNC区域为蔬菜种植区,△CMA区域规划为水果种植区,蔬菜和水果种植区由专人统一管理,△MNC区域规划为学生自主栽培区.△MNC的周围将筑起护栏.已知
m,
m,
,
,设
.
m,求护栏的长度(△MNC的周长);
(2)试用
表示△MNC的面积,并研究△MNC的面积是否有最小值?若有,请求出其最小值;若没有,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0566be94b1ed3e5d250ca530eeb529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd4997da49b3dfe98144ad13aed0d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5cf48407af008db11eb4f236691d741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd66efa75728f06d56c53886b58424c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbb12ea3cc86c6d177447ec2a222ffd7.png)
(2)试用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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解题方法
10 . 已知
,
,
分别为
内角
,
,
的对边,
是
平面内一点,下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() ![]() |
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