名校
解题方法
1 . 在
中,
,
,
对应的边分别为
,
,
,
.
(1)求
;
(2)奥古斯丁·路易斯·柯西(
,
年
年),法国著名数学家柯西在数学领域有非常高的造诣.很多数学的定理和公式都以他的名字来命名,如柯西不等式、柯西积分公式.其中柯西不等式在解决不等式证明的有关问题中有着广泛的应用.现在,在(1)的条件下,若
,
是
内一点,过
作
,
,
垂线,垂足分别为
,
,
,借助于三维分式型柯西不等式:对任意
,
,
,有:
,当且仅当
时等号成立.求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](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/00378760a6e82ce9cedf439fefcd065c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)奥古斯丁·路易斯·柯西(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8256dc6189acb4b7725a77a51d14444f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eed0c5f79940f13c180beb9c6a6f08a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c1e6722de0b51ea234a160c8330edc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcdb7671e6056d842cdc88fb523467f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1e005baa1be0da8cdf9173a9a46bd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b73a89dbaa50fe6abfbae19c8cc57d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4c1254b9aeec2bbd01d0eecca66d708.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5ba135022def1bcc1cddea66496706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ebbd1d0e4d44a11d9b0d65e73eef212.png)
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名校
2 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/956a43fa05ca6bb3a842c3381d11ce9c.png)
(1)求不等式
的解集;
(2)设函数
的最小值为
,若正实数
满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/956a43fa05ca6bb3a842c3381d11ce9c.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c582e765550902ce40e5ea3df432d3.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034a0f4d3755f5f4934e5f11b1296c6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3883eea1d4b6700810315c96f831abc0.png)
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名校
3 . (1)求证:
,并指出等号何时成立;
(2)利用(1)的结论,试求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0638d7fa91f9d2a24fee94c539dadfd8.png)
(2)利用(1)的结论,试求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93b15c3db0f189fd2d0711fde5d761aa.png)
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名校
解题方法
4 . 已知函数
.
(1)求满足不等式
的实数m的取值范围;
(2)记
的最小值为k,若
,且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/770bddf5aeb7d6294618eb2ecffd1b15.png)
(1)求满足不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a18914964ebf8d6d0efb35607e4417.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8674e0c29d69918736b83bdc8288dc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48325f732c8ba723f3b5dc30e1eb9c08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4136dd38f3c8baefac192e0f2f453cba.png)
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2卷引用:安徽省芜湖市2021-2022学年高三上学期期末文科数学试题
名校
5 . 已知
.
(1)解不等式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9483800e1d955faf19936ac9b35ab4b.png)
(2)已知
最小值为m,若a,b,c∈R+,且
求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51e0b8a3a59e6bd049ac05497e6c7ffb.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9483800e1d955faf19936ac9b35ab4b.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/269de93623cab2730f7dd28960ffb1cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/647fd27a7802ae63018e49ac0bc1862c.png)
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名校
6 . 设函数
.
(1)求不等式
的解集;
(2)设
,
是两正实数,若函数
的最小值为
,且
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4d823c3deb0d10dad0cb975affdfc3.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0abe4960954bb3144b7e86d4233e747.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/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e0ba25ed63bc3ac6412d4a1dc876928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2880bf403f9a087341673a8387c80df.png)
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7卷引用:安徽师范大学附属中学2021-2022学年高三上学期12月月考理科数学试题
安徽师范大学附属中学2021-2022学年高三上学期12月月考理科数学试题“四省八校”2021-2022学年高三上学期期中质量检测考试理科数学试题宁夏银川一中2022届高三上学期第五次月考数学(理)试题宁夏银川一中2022届高三上学期第五次月考数学(文)试题(已下线)专题十二 能力提升检测卷 (测) — 2022年高考数学一轮复习讲练测(课标全国版)(已下线)考点58 不等式选讲-备战2022年高考数学典型试题解读与变式江西省重点中学盟校2022届高三第一次联考数学(理)试题
名校
解题方法
7 . 已知a,b,c为非负实数,函数
.
(1)当
,
,
时,解不等式
;
(2)若函数
的最小值为2,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8804f13e3e57c40767957d44a6827e4.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a783088120d67cc98936081e80fb7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fbc901cbdb68130ddac3174583dd93c.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5cb8b9ae2c8c37306814a19b28594c7.png)
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2022-03-04更新
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7卷引用:安徽省六安市舒城中学2022届高三下学期一模理科数学试题
安徽省六安市舒城中学2022届高三下学期一模理科数学试题四川省泸州市2022届高三第二次教学质量诊断性考试理科数学试题四川省泸州市2022届高三第二次教学质量诊断性考试文科数学试题(已下线)重难点07 选考极坐标与参数方程、不等式 -2022年高考数学【热点·重点·难点】专练(全国通用)宁夏石嘴山市第三中学2022届高三第四次模拟数学(理)试题宁夏石嘴山市第三中学2022届高三第四次模拟数学(文)试题陕西省咸阳市武功县普集高级中学2022-2023学年高三上学期11月阶段性检测理科重点班数学试题
名校
8 . 设实数x,y,z满足
.
(1)证明:
;
(2)若
对任意的实数x,y,z,a恒成立,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338ac09ffd9addc3dadf363152c3e39d.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32067745cbf2eb217f0d042a38cda86.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8440b20960e3c4e1eacccd22531042ca.png)
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5卷引用:安徽省安庆市第一中学2021届高三下学期三模文科数学试题
安徽省安庆市第一中学2021届高三下学期三模文科数学试题安徽省安庆市第一中学2021届高三下学期三模理科数学试题(已下线)2021年全国高考甲卷数学(理)试题变式题21-23题(已下线)文科数学-2022年高考押题预测卷02(全国乙卷)(已下线)2021年全国高考甲卷数学(理)试题变式题21-23题
名校
解题方法
9 . 已知
,
,
,设函数
,
.
(1)若
,
,关于
的不等式
有解,求实数
的取值范围;
(2)若函数
的最小值为1,证明:
.
![](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/8cec12441802f71e803efaf2c62ee588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c590477ba7ab23bf38b1ac869d9a5102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0a3f1455383332789efbec3ac50900.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db3ccc2884627da3e6ff7f7f90208d9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4bcf12eb7065a2a540d3bc53395d43.png)
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4卷引用:安徽省滁州市定远县第三中学2022届高三下学期模拟检测理科数学试题
安徽省滁州市定远县第三中学2022届高三下学期模拟检测理科数学试题河南省名校联盟2020-2021学年高三4月联考数学理科试卷(二)河南省名校2021届高三尖子生4月联考数学(理)试题(已下线)不等式选讲【专项训练】-2020-2021学年高二数学(文)下学期期末专项复习(人教A版选修4-5)
10 . 已知函数
.
(1)求不等式
的解集;
(2)若函数
的最大值为
,且正实数
,
满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e4492464fc79e5360f2b9eec031eede.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66d61d5f66d68b4c4a2a25fd7103621.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](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/711d33dca588abbd3e2bead7ec99a384.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b03d58cb7a615087a874560a020d6a.png)
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4卷引用:安徽省宿州市2021届高三下学期第三次模拟考试理科数学试题
安徽省宿州市2021届高三下学期第三次模拟考试理科数学试题安徽省宿州市2021届高三下学期第三次模拟考试文科数学试题(已下线)押第23题 不等式选讲-备战2021年高考数学(理)临考题号押题(全国卷2)(已下线)押第23题 不等式选讲-备战2021年高考数学(文)临考题号押题(全国卷2)