已知
且
.
(1)若
,求证:
;
(2)若当
时,曲线
与直线
有且只有两个交点,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fc33ef35f7cfca753e8614662b65a87.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ffecb03c47be920254c4ccffa5b222.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7144b033af7d4a054a465982e5a3a85a.png)
(2)若当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12ec33f7b7d2c0ccab9a3910e0a1b037.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50866229ec5a3640fb250f9bd2192b3.png)
21-22高二下·陕西西安·期末 查看更多[2]
更新时间:2022-07-02 13:40:53
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解答题-证明题
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【推荐1】设函数
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(2)若函数
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(1)当
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(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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解答题-问答题
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名校
【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea74d936da897ef3deb04be676882322.png)
(1)若
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(2)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea74d936da897ef3deb04be676882322.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
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(2)当
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解题方法
【推荐1】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/903f1f0c9ff9bc834d16dfed6359f411.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c6b6a11760d0724b0b60e55970e229.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c069903b3b06877ffa9d6db7fbc5c57.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2620d01e91b7646e3300333c1acd96f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13880f3bc89cddc5164b11a1711f8d37.png)
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