已知关于
的不等式
在
上有解,则实数
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0705f1a33ee8802f4592ec8996ce93a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589ed49839c4dc0b033431d88a4c1f94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2023-10-25 12:48:58
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填空题-单空题
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较易
(0.85)
名校
解题方法
【推荐1】已知方程
有两个相等实数根,则下列说法正确的是________ .
①.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d75bf9db46e18426cb75c9b3b1d7bd0.png)
②.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e35ccf4c82ddf6d08956cdb616771553.png)
③. 若不等式
的解集为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b058f0a0ccb1440f02717234fda5664.png)
④. 若不等式
的解集为
,且
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c12a2fa21ae377bb56a21908ba0ba8c.png)
①.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d75bf9db46e18426cb75c9b3b1d7bd0.png)
②.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e35ccf4c82ddf6d08956cdb616771553.png)
③. 若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc1eb8caff453abec4cfe2a844417bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78fcc90d2892223de6d48cd9765ee0c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b058f0a0ccb1440f02717234fda5664.png)
④. 若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a60db8c98143159d25e910dd3d08dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78fcc90d2892223de6d48cd9765ee0c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6021973db7a17aa9b5c5104615e84d3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b97bb18e5ca34d22b5e827316a122a.png)
您最近一年使用:0次
填空题-单空题
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较易
(0.85)
名校
【推荐2】已知
,
,且
,则
的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/321c87a681f2186a467c7d49b5f0c259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
您最近一年使用:0次
填空题-单空题
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解题方法
【推荐1】函数
,
,
,
,对任意的
,总存在
,使得
成立,则
的取值范围为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c9b1c8b4e463b2d9e0ef8cdde8287cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0eac2b31a19918895e5af2d316490e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9d7a62ccffa29d98e4f389228e9477f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f2b5ee1eabb64358a3d9db2349b6fce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d5a5e70f64f0933ae1e4ddec5fa2c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a49684ba67f71171321586f1a77ad4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347ac85769012f89d1f9951684e1d7b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
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较易
(0.85)
解题方法
【推荐2】若不等式
在区间
上有解,则实数
的取值范围为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5749a51e1fb200fcb8576b85dd1a31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cf664ed944afee2ec6d18b67fd09b06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次