已知函数
.
(1)求不等式
的解集;
(2)若关于x的不等式
恒成立,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/067847202331db41f25d3214484f902e.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2868fc8e6dc8e0b15a381649a7bd5532.png)
(2)若关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d53972392f194807dad820e1e4c18367.png)
2022·河南·模拟预测 查看更多[5]
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更新时间:2022-04-21 10:40:47
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解答题-问答题
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适中
(0.65)
名校
【推荐1】已知一次函数
,且
,设
.
(1)若不等式
对一切
恒成立,求实数t的取值范围;
(2)设函数
.
①求函数
在
上的最大值
的表达式;
②若对任意
,都存在
,使得
成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a261e1d5eea492aa74d6eca801b2dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/462cbd881599f59d51e8a24a07bb9eaf.png)
(1)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7a8bd97fcd715a2b00b25b7a22eee5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790daaa89fc9d093f45023becf765697.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e711eba21892953ca759e5ab9414506a.png)
①求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb37d173605f006df4c51ba63b1841d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae4b8114fcc770a8512cf03da137ca4e.png)
②若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dcaccba5c5f4727f0d85d1b2efd7aa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a80bd981cd0292f598bc4fbf3ce8f5b.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
解题方法
【推荐2】已知:
,
(1)当
时,恒有
,求
的取值范围;
(2)当
时,恒有
,求
的取值范围;
(3)当
时,恰有
成立,求
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a79e7e3f3fb94ae680a660e83ce8d692.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a71baf6217604517fd98fa97d0f55b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998485ffeb46a0412ff1a0f814429257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a71baf6217604517fd98fa97d0f55b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998485ffeb46a0412ff1a0f814429257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f61566479dedf2dfe7dc60147df93091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e4de25e82482158ef140c75e02b66db.png)
(1)当
时,解不等式
;
(2)当
时,若
的最小值为2,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e4de25e82482158ef140c75e02b66db.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fbc901cbdb68130ddac3174583dd93c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7cfada8fd642ddf968bfd4228d48ec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.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)
【推荐2】已知函数
.
(1)解不等式
;
(2)若
的解集为空集,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec98e76177b9d44136b1580c167e15da.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ec4add31dd4c2d48aadbb7bd13e607.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1c1fa0f1031a2060825067dad1259d4.png)
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