相距6千米的两个观察站
,
先后听到远处传来的爆炸声,已知
站听到的时间比
站早4秒,该爆炸声速是1千米/秒,现以
,
所在直线为
轴,
,
中点为原点(如图)建立直角坐标系.
![](https://img.xkw.com/dksih/QBM/2020/12/31/2626273939963904/2632283675312128/STEM/d0ac73071cfe418eaea815a192aa4fae.png?resizew=249)
(1)判断爆炸点分布在何曲线上,并求出该曲线
的方程;
(2)求直线
与曲线
的交点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/2020/12/31/2626273939963904/2632283675312128/STEM/d0ac73071cfe418eaea815a192aa4fae.png?resizew=249)
(1)判断爆炸点分布在何曲线上,并求出该曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/736134684617311186889ad6a22528d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
更新时间:2021-01-09 10:17:45
|
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【推荐1】在平面直角坐标系
中,已知点
、
,
的内切圆与直线
相切于点
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
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【推荐2】已知点
,动点
满足
.
(1)求动点
的轨迹方程;
(2)记动点
的轨迹为
,若
是
上的不同两点,
是坐标原点,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01db0118fedcf6fcdde99ee28fe5618a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e1bd05b71aa0f9f979b0d4cb543ae3c.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)记动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b0ba14e41e306e5633ad4bf1cdedd8.png)
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解题方法
【推荐1】已知椭圆
的左、右顶点是双曲线
的顶点,
的焦点到
的渐近线的距离为
.直线
与
相交于A,B两点,
.
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c962f8d3a4a3bf56aeef0c7d1c047662.png)
(2)若直线l与
相交于P,Q两点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f720d54210a41058ee9570be3e949d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9d9ce3599189546fe4678889626dedc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6b011ab864988dcd47608001c9ff36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7248b18dbf9094f935f7b4a8b557755.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c962f8d3a4a3bf56aeef0c7d1c047662.png)
(2)若直线l与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44e8bc37ed03f44470762748a8f942a.png)
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【推荐2】已知双曲线
的离心率为2.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5c2e64358e0ec7aa142c336d970306.png)
(1)求双曲线C的渐近线方程
(2)如果双曲线C的焦点和椭圆
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【推荐1】如图点
为双曲线
的左焦点,左准线
交
轴于点
,点P是
上的一点
,且线段PF的中点
在双曲线
的左支上.
![](https://img.xkw.com/dksih/QBM/2011/3/24/1570059366473728/1570059371929600/STEM/5eb09fbd359c45fa8e0ff69ae512e682.png?resizew=207)
(1)求双曲线
的标准方程;
(2)若过点
的直线
与双曲线
的左右两支分别交于
、
两点,设
,当
时,求直线
的斜率
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75cec52260f08a13434fa88586b76690.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2011/3/24/1570059366473728/1570059371929600/STEM/5eb09fbd359c45fa8e0ff69ae512e682.png?resizew=207)
(1)求双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4658aaba6c4f522bdc59446a8f7ae53c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c11cd89b83d4b78bf66261ae000da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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【推荐2】过双曲线C:
=1的右焦点F且与x轴不重合的直线交双曲线C于A、B两个点,定点D(
,0).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/dab5d971-d466-4c1f-94ac-c42b50722fce.png?resizew=193)
(1)当直线AB垂直于x轴时,求直线AD的方程.
(2)设直线AD与直线x=1相交于点E,求证:FD∥BE.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22a0930282bfaa463f6813b72c050ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/dab5d971-d466-4c1f-94ac-c42b50722fce.png?resizew=193)
(1)当直线AB垂直于x轴时,求直线AD的方程.
(2)设直线AD与直线x=1相交于点E,求证:FD∥BE.
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