已知函数
.
(1)当
时,求不等式
的解集;
(2)当
时,存在
,使得
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9307cbf810137634e043dcf0810d51b.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abdaffa9c15517afe6d7ba6488f88f67.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81314d455c4a0df32700ae4ad73c84f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
2020·全国·模拟预测 查看更多[3]
(已下线)2021年全国高中名校名师原创预测卷 文科数学 全国卷Ⅰ(第一模拟)(已下线)押第23题 不等式选讲-备战2021年高考数学(文)临考题号押题(全国卷2)广西柳州市、梧州市2023届高三下学期2月大联考数学(理)试题
更新时间:2021-01-14 10:49:55
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解答题-问答题
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【推荐1】设
,
,
.
(1)解不等式
;
(2)
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf53f232cd433b791e3696c0ba97750b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4367e45a47a02037a38bd591dd09f930.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640cb603fc8315d9e37c97561f6a7b83.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e2405c4822bceae1cf191edb502d3b0.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad5fe274cfc8da2dacfb65801f344ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee59fbe13325820ec6fc47eb5f35d87.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
解题方法
【推荐2】已知函数
.
(1)当
时,求不等式
的解集;
(2)若
的解集包含
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b29599b9456822d1fbc6fdb43922c291.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2608a57caffde627dbf140ca22a2ff8a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810e8fa5cf17ae94a41803772c488726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1279ef84071f5ad7c4c1681357edd84.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
|
较易
(0.85)
【推荐3】已知函数
.
(1)求不等式
的解集;
(2)若不等式
的解集为
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83885a8e289d2f6d47ae4c6d65472761.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab989f85a681b41c29465d4be74b789f.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5645aeacf7a83dc2ed195e9cbfdb7b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-作图题
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较易
(0.85)
【推荐1】已知函数
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/bd277882-0ef8-4550-801a-f4acd9472428.png?resizew=228)
(1)画出
和
的图象;
(2)若
,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858c385963fef9f6693df925dfe4c25e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/bd277882-0ef8-4550-801a-f4acd9472428.png?resizew=228)
(1)画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ec6af6118d005c38685e52684f1893.png)
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【推荐2】已知
(
).
(1)当
时,求不等式
的解集;
(2)对于任意实数
,不等式
成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e259fc7a535ed847113eb4e3c08147cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e72f6b2ef3329828cb8fc873eeba7c.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5508e4733e7e6c36712540deea036414.png)
(2)对于任意实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f3da051cccdd8841d00635a3ebdd0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次