已知函数
.
(1)求
的最大值;
(2)若关于
的不等式
有解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13a7d74b2d0d356ff5fd0411d3313e9.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ac7b05862314a38d1c718f88bc61ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
18-19高三·云南昆明·阶段练习 查看更多[6]
2020届云南省昆明市第一中学高三第三次双基检测数学(文)试题2020届云南省昆明市第一中学高三第三次双基检测数学(理)试题重庆市九龙坡区2020届高三第三次质量调研数学(文科)试题(已下线)专题23 不等式选讲-2020年高考数学(理)母题题源解密(全国Ⅱ专版)(已下线)专题23 不等式选讲-2020年高考数学(文)母题题源解密(全国Ⅱ专版)(已下线)专题06 等式与不等式-【备战高考】2021年高三数学高考复习刷题宝典(解答题专练)
更新时间:2020-08-19 09:48:25
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【推荐1】在
中,
,
,
分别为内角
,
,
所对的边,
.
(1)求角A;
(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1948773eeedd3b8aecc17a56579b145a.png)
(1)求角A;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa1c67fa633756c2839eae98eb7e1af1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】如图,用面积
的铁皮制作一个长为
,宽为
,高为
的无盖盒子.制作要求如下:①铁皮全部用完,且不计拼接用料;②
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/10/4967a706-0467-4ff2-977f-1a0f77c97141.png?resizew=148)
(1)求
的取值范围;
(2)当
,
分别为多少时,箱子的容积
最大,并求出最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/921b5487ac6875c148a3dcdc86db8a9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7adc6ff6f2063c72303c2a0fcb0bb4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f71a41641aa0d0e45a3c03d3d2c1196b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfa91f9571ea2ece7b5d3abb043d61d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab79d0f0102a0573deaa961355861293.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/10/4967a706-0467-4ff2-977f-1a0f77c97141.png?resizew=148)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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【推荐3】已知椭圆
,
、
分别是椭圆
的左、右焦点,
为椭圆上的动点.
(1)求
的最大值,并证明你的结论;
(2)若
、
分别是椭圆
长轴的左、右端点,设直线
的斜率为
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,求直线
的斜率的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4402aeb853b22f20992156957ef0fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22a3c7e465a61e9849dd223261be47c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94435aa75f0ff3351f2b2c7a3dac344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
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【推荐1】设集合
.
(1)若
,试用区间表示集合
,并求
;
(2)若
,求不等式
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20eca97f66730b2ed0c1bdad2fe0367d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3320a13248a3a1208ff6ee85c9d26f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ebaa32f4f1f4f807ca9aeb7fb29951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3744e71abf4b43e128eabea9181b712.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a625666afb6f983fe722af3e2fa07354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7079eec837de4dc4279f66e3668dc499.png)
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【推荐2】已知a,
,且
.
(1)求
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(2)若存在a,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a41f4fbedabe63cc68d0e2d1becf51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289cbae468920fc142cd41b8fd5ce856.png)
(1)求
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(2)若存在a,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a41f4fbedabe63cc68d0e2d1becf51.png)
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