若关于x的不等式
的解集为
.
(1)当
时,求
的值;
(2)若
,求
的值及
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fbd5b27186bda38a385696cd8976a1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/887852d01a35ad567077323a6904881e.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc304a55feec5d8312d3082f1bb91a23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c7f898043b0eb9517704f7b66a58d7e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96705daa1ff911782dfbd81d1bcc088c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da59b8dc46d9dd30e52c555c7be30fc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/129ad84d60a7afd0fb722a0c0f5ca6ea.png)
更新时间:2022-01-14 15:39:54
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【推荐1】已知关于
的不等式
的解集为(1,2),求关于
的不等式
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5f28031b036e4a37be931d5ff28368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c72656c882b2830eeb8053ec18c0088f.png)
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【推荐2】已知不等式
的解集为
或
.
(1)求
;
(2)解不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9deeb02676b13db2735699803f8c601.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f20c78ad990e2424f4ece6a926e17bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/890d6dafa253b76e17c37f607ad29a53.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fefcd78b7056d52264d105f578dbdac.png)
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解题方法
【推荐1】如图,等腰直角
中,
,
分别在直角边
上,过点
作边
的垂线,垂足分别为
,设
,矩形
的面积与周长之比为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/8/9741fc26-8b6d-450a-a3ae-d064e7d89765.png?resizew=224)
(1)求函数
的解析式及其定义域;
(2)求函数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50da02f2eb11970b7ce46d9bf87e22a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d988be329b519dd1115fcc611fd30157.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/8/9741fc26-8b6d-450a-a3ae-d064e7d89765.png?resizew=224)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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解题方法
【推荐2】已知
在
时取得最小值,试求a的值,并求出最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab987b57c9085ada103a4983a8e678c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
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