(1)解不等式
;
(2)已知
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e929513453c3f44d229cd3ea17bdc9f4.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e0cc2b5252d5e35c0f7b87824ac20e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
2023高一上·全国·专题练习 查看更多[1]
(已下线)专题14指数函数-【倍速学习法】(人教A版2019必修第一册)
更新时间:2024-01-10 20:24:30
|
相似题推荐
解答题-作图题
|
较易
(0.85)
解题方法
【推荐1】(1)解不等式
;
(2)对于题目:已知
,
,且
,求
最小值.
同学甲的解法:因为
,
,所以
,
,从而:
.
所以
的最小值为8.
同学乙的解法:因为
,
,
所以
.
所以
的最小值为
.
①请对两位同学的解法正确性作出评价;
②为巩固学习效果,老师布置了另外一道题,请你解决:
已知
,
,且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75cc5360e0e54cde5e73ffbea959790.png)
(2)对于题目:已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d73552080b72be89317eb60e9bef76c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27a0d4c12a65a54c29f1ef8e2601d29d.png)
同学甲的解法:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4251548d5b6df7d28599be1002f02ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba107edb7565f1f294137d2b70548ce3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5acc0d2031d4d6ede3838732b4b90fbf.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
同学乙的解法:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ff78ba3e74c1fa1f1abdb83969c3277.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec978eb43bc4f9e7df83b0d0195dcda.png)
①请对两位同学的解法正确性作出评价;
②为巩固学习效果,老师布置了另外一道题,请你解决:
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/def2a209038816cc74a1bafb8f390598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/add21924d10481916191cad9cde56b50.png)
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解答题-问答题
|
较易
(0.85)
名校
解题方法
【推荐2】已知集合
或
.
(1)分别求
和
;
(2)若集合
,若
是
充分不必要条件的,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da0ea6cf72c771e8d545e83f9917f904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69bdd83aa02152e0d1063c3a68e8fca9.png)
(1)分别求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3096a6008074328422ed8cf5bf77adab.png)
(2)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df12b9ecb0bd5be368cf460a63fa3c7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dc529c97aee87c72cf7bc3baa8f5fff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1188d0d8e53c66dcf36467d3096d1408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-问答题
|
较易
(0.85)
解题方法
【推荐1】已知函数
的定义域分别为
.
(1)求集合A,B;
(2)设全集为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3f0cad6644361f9fa26f59d8b16641d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
(1)求集合A,B;
(2)设全集为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860ebb6f76cd3cb9a265dfc233002a13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f7f860e8f0503c476eaf0bd73a71810.png)
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解题方法
【推荐2】定义一种集合运算:
,且
.例如,
,
,则有
.已知集合
.
(1)求
;
(2)求
和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1944b815fed5fc15d2e1dae18103fcd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e10255d9c38c5db2be76d20e809acb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522954ce536d559cf03638d87fad504c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d08a15ffba3e8a8b47cb41c10ba90e58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f108b2a10557e2677af0550b64733303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43f40e78deba00813c306eb88e470da0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c81919684bc4047d376c7e57dc6c8f1c.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5eeaa30850a2dd1abcb46208ac8b6a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc47e90aa60757ef5ff7846d301f3aa6.png)
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