已知函数
的最小值为2,
.
(1)求a的取值范围;
(2)若
,求k的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb767fc15f6c6647fead1fb39e9e9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e55ead24be08f8dbca4d1e611266469.png)
(1)求a的取值范围;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447d6f62c09c1d05346fd16a24159f6e.png)
更新时间:2022-03-30 11:41:11
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解题方法
【推荐1】已知函数
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(1)当
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(2)若对于任意的
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(1)当
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(2)若对于任意的
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(1)若
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;
(2)若不等式
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(1)若
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(2)若不等式
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec6e670a42540cda5ef071ff5e1efcfe.png)
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【推荐1】已知函数
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(1)不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af7e5cd65bc9d3051c2c72311ca8f88d.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d86be2de99fbf7f99cd54ab399146b00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3c420702164ed01e0f456269a0189e.png)
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已知函数
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(1)求不等式
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已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/580448e27a4159da8a733d3dfab08c4b.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66ad4e5d32392ca24b31f28b910a54e7.png)
(2)若存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef89ae944594d7de79875a5082c8c141.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐3】已知函数
.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad7fc1cb6670b23f8e2f7117431c3648.png)
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,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afdb0f7a404acc156ef170f47d9665d0.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)已知实数a满足
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【推荐2】已知函数
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