名校
1 . 已知集合
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5914c9c19b071295f6ad6f014434811f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-12-04更新
|
753次组卷
|
4卷引用:黄金卷03(文科)
2 . 已知函数
.
(1)求不等式
的解集;
(2)若
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d147ad3a0000144031f0b07282c54787.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/062844ed8f0949e6717bb6fd0b84fe46.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85eea839d4c6dc1cf167171c3f51eb4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解题方法
3 . 已知a、b均为正数,设
.
(1)当
时,求不等式
的解集;
(2)若
的最小值为6,求
的值,并求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c77137f24451d1899bed097920b4c75.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48adb8a59b5c02fad5eada1b35171cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6009d51b897a4f898b57e483234f391a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f7266b2ef457b8ddeee3fa2cc24022e.png)
您最近一年使用:0次