已知函数
.
(1)当
时,解不等式
;
(2)若
在
时有解,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c239689ff467e060d518404088b6f60d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b4955c5adc717b7f6f0b975e0724ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53224898de85a85058ad336490bbbaa7.png)
2022·黑龙江哈尔滨·二模 查看更多[4]
黑龙江省哈尔滨市第九中学2022届高三第二次模拟考试数学(文)试题黑龙江省哈尔滨第九中学2022届高三第二次模拟考试数学(理)试题(已下线)必刷卷03(理)-2022年高考数学考前信息必刷卷(全国甲卷)(已下线)必刷卷03(文)-2022年高考数学考前信息必刷卷(全国甲卷)
更新时间:2022-04-04 14:56:28
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解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】已知函数
.
(1)解关于
的不等式
;
(2)记
的最小值为
,已知实数
、
、
都是正实数,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e25d2e7171f37c4159bcc52649e14e.png)
(1)解关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4b781b577380833bf91d2b2f1169c50.png)
(2)记
![](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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b4dffe7e37fb8e6fd0ef1a8de82e8b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c13349814250ec5c66d7b9387a13ac0.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐2】已知函数
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)当
时,求不等式
的解集;
(2)当
时,若
恒成立,求实数a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/743570a5e44dcea6a7a04e7796fda136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e2405c4822bceae1cf191edb502d3b0.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/293d639e67df2da17966a567db2656e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ed633bfebf61f2126f3ff58fb8e75.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
【推荐1】选修4-5:不等式选讲
已知函数
,
(Ⅰ)若
,求不等式
的解集;
(Ⅱ)若方程
有三个不同的解,求
的取值范围.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c82dc6468bfdc567624e9e21ef9a4f8.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
(Ⅱ)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d761c4444f5eac17133caaf19d6b9ef.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
解题方法
【推荐2】已知函数
.
(1)求不等式
的解集;
(2)若
对
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f64628280f10b667ff6de715a709fb15.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51be2648696e224a47fffb679cc821b9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/928ff74a6a296cc53ca3657c8154e652.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次