12-13高三上·山东聊城·阶段练习
1 . 选作题(请在下列2小题中选做一题,全做的只计算第(A)题得分)
(A)在极坐标系中,曲线C1:
,曲线
,若曲线C1与C2交于
两点,则线段
的长度为_________________
(B)对于任意的实数
和
,不等式
恒成立,试求实数
的取值范围._____________
(A)在极坐标系中,曲线C1:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ab37e95cbf394528417f55dd6e20811.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b08ee5e23039fe909db077afcb0ac94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ae1567d8f98fabc1a3948f8602cc5e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
(B)对于任意的实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1644648016a729c40f923f9e77da58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77e8acd0a0c330c8f81a08b92a226f7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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