名校
解题方法
1 . 选用恰当的证明方法;解决下列问题.
(1)
为实数,且
,证明:两个一元二次方程
,
中至少有一个方程有两个不相等的实数根.
(2)已知:
,且
,求证:
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c1476efe1fd8970d815af8a6e62d454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/341f6b48e2c616585ed9bd7dbb9c8728.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc3ce04492780c4d40fab17aa28d3755.png)
(2)已知:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c96a416540d6d2c2570c7106f5e0492.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03f1c0c0618a585e86afc523bd523e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356bc29ee1bc3f046d9a7b2804c77cf9.png)
您最近一年使用:0次
2023-10-14更新
|
98次组卷
|
2卷引用:辽宁省大连市金州区金州高级中学2023-2024学年高一上学期10月月考数学试题
名校
2 . (1)若
且
,求证:
;
(2)若
为正实数,且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481ee0d1e39e92a4732eea90225eb94c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca27cc54ca0332245f5167488daa3408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce37be14cad3e2409eada581dc029aca.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7dbc702617c765a573961953cc0901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16195724ab65f5ed0f378a14051ff5bd.png)
您最近一年使用:0次
3 . 选用恰当的证明方法,证明下列不等式.
(1)证明:求证
;
(2)设
,
,
都是正数,求证:
.
(1)证明:求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14c19d94ff48082c1cd213c82c99abf0.png)
(2)设
![](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/533937a08d1ed87594ac52c658be9649.png)
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2019-11-23更新
|
1312次组卷
|
3卷引用:辽宁省大连市2019-2020学年高一上学期期中数学试题
辽宁省大连市2019-2020学年高一上学期期中数学试题安徽省池州市青阳县第一中学2020-2021学年高二下学期3月月考文科数学试题(已下线)2.2基本不等式-2021-2022学年高一数学同步辅导讲义与检测(人教A版2019必修第一册)
名校
解题方法
4 . 设直线l的方程为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa385fc6c25980eb763ed94ca9c15828.png)
(1)求证:不论a为何值,直线必过定点M;
(2)若l在两坐标轴上的截距相等,求直线l的方程.
(3)若直线l交x轴正半轴于点A,交y轴负半轴于点B,
的面积为S,求S的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa385fc6c25980eb763ed94ca9c15828.png)
(1)求证:不论a为何值,直线必过定点M;
(2)若l在两坐标轴上的截距相等,求直线l的方程.
(3)若直线l交x轴正半轴于点A,交y轴负半轴于点B,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
您最近一年使用:0次
2023-10-11更新
|
893次组卷
|
2卷引用:辽宁省大连市金州区金州高级中学2023-2024学年高二上学期10月月考数学试题
5 . 在平面四边形ABCD中,
,平面ABCD外动点P满足:
,点P在平面ABCD内的射影在直线AB上,
平面ADP.
(1)证明:
平面ABP;
(2)求AP与平面PCD所成角的正弦值的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/633cd6eedae22086ce3f08a49fef9d90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecbb2dce15f3d0fe839688575d2a8ff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002cc6a0373255f39172cdee62fb6b39.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
(2)求AP与平面PCD所成角的正弦值的最大值.
您最近一年使用:0次
6 . 古希腊数学家欧几里得所著《几何原本》中的“几何代数法”,很多代数公理、定理都能够通过图形实现证明,并称之为“无字证明”如图,
为线段
中点,
为
上的一点以
为直径作半圆,过点
作
的垂线,交半圆于
.连接
,
,
,过点
作
的垂线,垂足为
.设
,
,则图中线段
,线段
,线段______
;由该图形可以得出
,
,
的大小关系为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3d296e0d7154a170cb7d3ae42989b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bcccda6e75578c160552bcb1d7f160b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9ce2f12cd473b0877cb01872ec45141.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8a24490af6cdebc539613da0a98d762.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26234bb9c659eb48da0247dd6a465d65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/3757da65-71fc-4c20-9430-975b3469b269.png?resizew=185)
您最近一年使用:0次
名校
解题方法
7 . 已知奇函数
的定义域为
.
(1)求实数
的值;
(2)判断函数
的单调性,并用定义证明;
(3)存在
,使得
成立,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f7806c6ebbf84454a5b7d20e3b53df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da2d7bd885721fd0c5cd9465d0799f84.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53224898de85a85058ad336490bbbaa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e901793f5a7505f1ac241fe16f65b67.png)
您最近一年使用:0次
2023-12-15更新
|
1368次组卷
|
17卷引用:辽宁省大连长兴岛高级中学2023-2024学年高三上学期第一次月考数学试题
辽宁省大连长兴岛高级中学2023-2024学年高三上学期第一次月考数学试题陕西省西安市雁塔区第二中学2021-2022学年高二下学期第二次月考理科数学试题江苏省南通市如皋市2022-2023学年高三上学期暑期检测模拟测试数学试题(已下线)2023届高三第一次月考押题卷(测试范围:集合与常用逻辑用语、不等式、函数与导数)(已下线)期中模拟卷01(测试范围:前三章)-【单元测试】2022-2023学年高一数学分层训练AB卷(人教A版2019必修第一册)江苏省镇江市扬中市第二高级中学2023-2024学年高三上学期阶段检测二数学试题(已下线)第三章 函数(单元测试)(能力卷)-高一数学同步精品课堂(人教B版2019必修第一册)(已下线)第四章 幂函数、指数函数与对数函数(压轴题专练)-速记·巧练(沪教版2020必修第一册)(已下线)5.2.3 函数的最值-同步精品课堂(沪教版2020必修第一册)上海市朱家角中学2023-2024学年高一上学期第二阶段质量检测数学试题广东省广州市番禺区象贤中学2023-2024学年高一上学期12月月考数学试题江苏省连云港高级中学2023-2024学年高一上学期12月月考数学试卷(已下线)单元高难问题03函数恒成立问题和存在性问题-【倍速学习法】(沪教版2020必修第一册)江苏省镇江市扬中市第二高级中学2023-2024学年高一上学期期末模拟数学试题(一)上海市杨浦高级中学2023-2024学年高一上学期期末考试数学试卷江苏省镇江市扬中市第二高级中学2023-2024学年高一上学期期末模拟数学试题(二)福建省宁德市第五中学2023-2024学年高一下学期开门考数学试题
名校
解题方法
8 . 设实数
满足
.
(1)若
,求证:
;
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adf913c92060a7bad4de1ee8c04d011e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a9344f4fca7b9779ca7720e5277ea6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94752276c75f22d290087179226d450f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77c7bf45f9250579251fbbf382b32fde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
2023-08-12更新
|
608次组卷
|
3卷引用:辽宁省大连市第八中学2022-2023学年高一上学期10月月考数学试题
解题方法
9 . (1)已知
,
,
都是正实数,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b266ea51b4019ca1e7974f97c9e5c740.png)
(2)设
,且
,求证:
![](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/b266ea51b4019ca1e7974f97c9e5c740.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce613eaa5df46a50174085ef5d1087fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e56f4504e0f80fd031c8b5f41832e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff6d61a8eaff20b364a9e3235577c69.png)
您最近一年使用:0次
名校
10 . 对于题目:已知
,
,且
,求
最小值.
甲同学的解法:因为
,
,所以
,
,从而
,所以
的最小值为
.
乙同学的解法:因为
,
,所以
.所以
的最小值为
.
丙同学的解法:因为
,
,所以
.
(1)请对三位同学的解法正确性作出评价(需评价同学错误原因);
(2)为巩固学习效果,老师布置了另外两道题,请你解决:
(i)已知
,
,且
,求
的最小值;
(ii)设
,
,
都是正数,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a120e118263f6b9fde8054e1a57479.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bc579ce6e76737b53377b5c44b72b8.png)
甲同学的解法:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee7c17173292f5f25112364145143fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a62cd42aaaa823c0b862c8449b4a78e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba18dd6634f04aaf102c929c14095c0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/453ea8f3a2b85526b54bf453871c3820.png)
乙同学的解法:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831ec03409081480f2943a55749ea0e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
丙同学的解法:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b421a2b4f2ccc36be8416a6f21cdfed3.png)
(1)请对三位同学的解法正确性作出评价(需评价同学错误原因);
(2)为巩固学习效果,老师布置了另外两道题,请你解决:
(i)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0b256fd7584a2f3d3bd45b503a286e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf89638b5a0ed9a8b35260b042b691d.png)
(ii)设
![](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/533937a08d1ed87594ac52c658be9649.png)
您最近一年使用:0次
2023-10-20更新
|
274次组卷
|
3卷引用:辽宁省大连市第八中学2023-2024学年高一上学期10月月考数学试题