1 . 已知曲线
.从点
向曲线
引斜率为
的切线
,切点为
.
(1)求切点
坐标和切点
的坐标;
(2)已知
在
上是递减的,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9003aa4b018237cb072037fb5c601295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fe413b12ffabfb252121aa2eaa31017.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc31dcdb99754fc452ff2b92a2fb8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b6db56d3af870687872b9b0ec93821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7c5e7bd6bac51402ffa04b4144ec78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1582e020ff2bc37a3afc329583ef0ce5.png)
(1)求切点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aed435445650d8f895db250da2ba8ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15144429d33c518bfbb1aec4e8fb1afd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627c07e6238e8a72112a81af7c351263.png)
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2021-08-24更新
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3卷引用:内蒙古赤峰实验中学、桥北四中2022-2023学年高三下学期大联考数学试题(文科)
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