已知
.
(Ⅰ)若不等式
对任意的
恒成立,求a的取值范围;
(Ⅱ)若不等式
的解集为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb654fb6d68b2fa5e73ea2c111899e2.png)
(Ⅰ)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
(Ⅱ)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3f1123df2cc7e3548da93fdeeefa9c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a7e88b74f492f89e21e4cf65353bdb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
更新时间:2021-01-29 23:08:17
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相似题推荐
解答题-问答题
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名校
【推荐1】已知关于
的不等式
的解集为
.
(1)求
,
的值;
(2)解关于
的不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c84f791dabaf4e6dd3e0da98c6501a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186ff5269bfa2191d9515348f50f7d02.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)解关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e4cc2e2e5f9e602dd3d75b3bde6990.png)
您最近一年使用:0次
解答题-问答题
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较易
(0.85)
名校
【推荐2】已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aef0ea8624a545bce1aaebfb6694cd6b.png)
,
(I)解关于
的不等式
;
(Ⅱ)若关于
的不等式
的解集为
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aef0ea8624a545bce1aaebfb6694cd6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3e3bcd67cf1a355986c6e3132470c7.png)
(I)解关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d8742c296a7949b598114a34c51f69.png)
(Ⅱ)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f42342632cbd8e9cfbae17b76d94b033.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2157b41548f02a86a438e63238719841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.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】二次函数
.
(1)当
,
时,求此函数的零点;
(2)若不等式
的解集为
,求实数
,
的值;
(3)当
时,不等式
在
上恒成立,求实数
的取值集合.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e329289c5643e37270096885ecc29f4.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82986ab38a4ae58593191ccae2a44f62.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63451905271a495a3c013da636e0a38f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef3e8a28bd46c493e4adb95194f43532.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7e96d28f8b6fb5b6f7700870ca0ea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/933093b52cca887f597cbe22a5467b11.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
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较易
(0.85)
解题方法
【推荐2】已知函数
.
(1)当
时,解不等式
:
(2)若不等式
的解集为R,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21945ee4783e12943fa828168980c293.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab839d8569171afab5ed55c22013aa72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b666663ce3537a634a3b427b418eb62.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
您最近一年使用:0次