已知函数
.
(1)求不等式
的解集;
(2)若
恒成立,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b1b729a442338082dee6b5f37f4b8ce.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5e587ca42942c63cf7ba196a355a81.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b5db2bb917fb52c38bd3fb648917aa1.png)
更新时间:2023-02-03 13:32:58
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【推荐1】已知函数
;
(1)若不等式
的解集为
,求
的值;
(2)在(1)的条件下,对任意的
,都有
,求
的取值范围;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f13348c5046ab737279ed5776a93efab.png)
(1)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef6f4cf539a232bc766768a9bc257b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a7e88b74f492f89e21e4cf65353bdb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)在(1)的条件下,对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/974dfe3e72d5f88f7176eee3f2db58d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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解答题-问答题
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【推荐2】已知函数
.
(1)当
,
时,求不等式
的解集;
(2)若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93cdf4ed9a483bb7c8e7c73086b1cb86.png)
,证明:
或
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c99988855b36c76287e2fa52649a37.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48adb8a59b5c02fad5eada1b35171cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a783088120d67cc98936081e80fb7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5e587ca42942c63cf7ba196a355a81.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93cdf4ed9a483bb7c8e7c73086b1cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8407a79a35b42bd01409c85d2ccf2bc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ec854a0684a65bf7293abccb7b701f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a80102eea126cd7aabff15b132d94925.png)
您最近一年使用:0次
解答题-问答题
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解题方法
【推荐1】已知函数
,
.
(1)当
时,解不等式
;
(2)若存在
满足
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb87286546f7c81542076c2d059f8bf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abdaffa9c15517afe6d7ba6488f88f67.png)
(2)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd00e1b299750da61441910280c4e00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
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【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b17745429b71ddf0baabc4f5a65e8c.png)
(1)解不等式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e2405c4822bceae1cf191edb502d3b0.png)
(2)若
对任意实数
都成立,求实数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b17745429b71ddf0baabc4f5a65e8c.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e2405c4822bceae1cf191edb502d3b0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c80315917e7f564864105cd4c7e95fb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐3】设函数
.
(1)求不等式
的解集;
(2)若函数
的最大值为
,正实数p,q满足
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05c2b129259544644b5220805a9d2e51.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/dc63d1efc6b7cbfa6109155246d1fd1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d58f8795e8921fd1cefdf38ea0190211.png)
您最近一年使用:0次