已知函数
,其中
为正实数.
(1)若
,求不等式
的解集;
(2)若
的最小值为
,问是否存在正实数
,使得不等式
能成立?若存在,求出
的值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30d10c8ada2780d273e95ec99d6d7d6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48adb8a59b5c02fad5eada1b35171cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fbc901cbdb68130ddac3174583dd93c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0212ffd91eff338c84f92667e4bfc089.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
更新时间:2018-05-30 21:43:29
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解答题-问答题
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适中
(0.65)
名校
【推荐1】已知函数
.
(1)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/718b9e5546b83db9a7646207ae04725b.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8b33cc5994177b42becfac463fd3486.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a43c764125efd8be99e91672ecfdd3.png)
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适中
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解题方法
【推荐2】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
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(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627be93cfaae854ee37fffc5b83f9512.png)
(2)
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【推荐1】选修4-5:不等式选讲
已知函数
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(1)解不等式:
;
(2)若函数
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,且
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已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc104cc4a408bd056dcbae27e1f1cca.png)
(1)解不等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f7d3f1ec12c184bdfb0700a91bcf71.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb22eb3cc8e86dc462a1ebfe9f333fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0343ed3d770af73ef53ea55568d78a7a.png)
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(0.65)
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【推荐2】已知函数
.
(1)求不等式
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(2)若存在实数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab2df0ae1f2a2530b7bef95bb2e842d.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0dd18467feea8eb478f4669a32c2d57.png)
(2)若存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89a3d8ef2a0649b55e9e6fdcddaddad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐3】已知函数
.
(1)求不等式
的解集;
(2)函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2820e6e888da175da63fb59e0990c8.png)
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