已知
,函数
,设
,记曲线
在点
处的切线为
.
(1)求
的方程;
(2)设l与x轴的交点为
.证明:
①
;
②若
x,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0fd955cb11fbb502fdfe97c264a97b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6270bb08b90f72d5671ab8225f356c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8674b8c449a74c37fef3407f2ffcd582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)设l与x轴的交点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb652143b43cc9439a347b2b1dc5cf6.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e37ca83d51488ea2896f8348a626b705.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c4b0f8de92236de6f22825f73084c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0de268b006b96ceba6298511cb0bdb3.png)
2011·湖北省直辖县级单位·三模 查看更多[1]
(已下线)2011届湖北省天门市高三模拟考试(一)文科数学
更新时间:2016-11-30 21:11:12
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(1)当
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(2)若
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解答题-证明题
|
较难
(0.4)
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(1)求
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【推荐1】(1)证明:当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
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名校
解题方法
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(1)当
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