解题方法
1 . 已知函数
.
(1)若
,求函数
的最小值;
(2)若
对于任意
恒成立,求
的取值范围;
(3)若
,求函数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e3e13e2cfde73f4297be32eac1367d6.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13d9c6823217ff1aced49ed46c82a15a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65cbaab1c2d4552b55acebae2a7676be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fa4cfd7aee189c1aab1edfbf0a22d58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c72c1d8395ec8f22bea23a6b066adc4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82c60cad20a60beb10a07accdaef90c4.png)
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2020-02-18更新
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850次组卷
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3卷引用:天津市东丽区2022-2023学年高二下学期期末模拟数学试题