(1)解不等式:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed75a3b2022d7b23b2bf51c82c0b7b58.png)
(2)设a,b,c均为正数,且
,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed75a3b2022d7b23b2bf51c82c0b7b58.png)
(2)设a,b,c均为正数,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751e274e9107d780c39ba9c49d6daefb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a3cfe361051dc5e9a3a36b2818db0.png)
更新时间:2021-10-27 09:10:33
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解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】已知关于
的不等式
.
(1)当
时,解关于
的不等式;
(2)当
时,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71e2fda5a2615a5365973a38f5366ca1.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c0d9e40be9c8dc27e62d7ab9bdc8959.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71e2fda5a2615a5365973a38f5366ca1.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2】已知函数
.
(I)当
时,求不等式
的解集;
(II)若关于
的不等式
有且仅有一个整数解,求正实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a09266fa332f4ac5a18f30d4aa5436.png)
(I)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5aa1100364bd2cf61fd9868db88c08f.png)
(II)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5aa1100364bd2cf61fd9868db88c08f.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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适中
(0.65)
【推荐1】已知实数
和
,判断下列不等式中哪些是一定正确的?
(1)
;(2)
;(3)
;(4)
;(5)
;(6)
;(7)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48fe5d9cbe4f83926f5c21912df67a2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e1b70da901b3027df493e4c55bf9706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/689f982af451283289255c87593ec338.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa23408bcc9f6200f22a310e5f2569a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a37a329dd544397413f3885349e8109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46973ec354692c420913269bc23a8035.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58096422287031b330b10f9f47fec467.png)
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解答题-证明题
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适中
(0.65)
解题方法
【推荐2】(1)已知a,b,c是不全相等的正数,求证:
;
(2)用反证法证明:若函数
在区间
上是增函数,则方程
在区间
上至多只有一个实数根.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9ab8d8a251e0ec8d0e21a8f2372ef78.png)
(2)用反证法证明:若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b92b70365c63607daecdc8deb73ecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
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