名校
解题方法
1 . 如图,在平面直角坐标系中,
分别为双曲线
的左、右焦点,双曲线离心率为
,若点
为双曲线右支上一点,且
,直线
交双曲线于
点,点
为线段
的中点,延长
,分别与双曲线
交于
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/27/2a04c310-e16b-4d74-b9ca-2cd997eaf425.png?resizew=255)
(1)若
,求证:
;
(2)若直线
的斜率都存在,且依次设为
.试判断
是否为定值,如果是,请求出
的值;如果不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d864b6ecea3656003f9b82757926ef88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7f81d661b9cb1b6b61e2992a18296.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86dbcf83cd5d3421b3eed7be7dab32d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438b087a3b66f48298b5a944629adb44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a77aa6c27acfffcc601d9ca7e6d4c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/27/2a04c310-e16b-4d74-b9ca-2cd997eaf425.png?resizew=255)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a1467ecf286e3cadaf5aa006606f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eab0357b5e80a6fa5b1c51a2f01be14.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b487a48fb03928254b978f9245418515.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a3f348a942d468f0d77c0dfbb41d87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a3f348a942d468f0d77c0dfbb41d87.png)
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2022-03-17更新
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4卷引用:贵州省贵阳市第一中学2022届高三高考适应性月考(六)数学(理)试题