如图,在平面直角坐标系中,点A在x轴的正半轴上,点B在x轴的负半轴上,点C在y轴的正半轴上,直线BC的解析式为y=kx+12(k≠0),AC⊥BC,线段OA的长是方程x2﹣15x﹣16=0的根.请解答下列问题:
(1)求点A、点B的坐标.
(2)若直线l经过点A与线段BC交于点D,且tan∠CAD=
,双曲线y=
(m≠0)的一个分支经过点D,求m的值.
(3)在第一象限内,直线CB下方是否存在点P,使以C、A、P为顶点的三角形与△ABC相似.若存在,请直接写出所有满足条件的点P的坐标;若不存在,请说明理由.
(1)求点A、点B的坐标.
(2)若直线l经过点A与线段BC交于点D,且tan∠CAD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f7626c207a4dc82d4d59cb520c91e49.png)
(3)在第一象限内,直线CB下方是否存在点P,使以C、A、P为顶点的三角形与△ABC相似.若存在,请直接写出所有满足条件的点P的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2022/1/6/2888376942575616/2889318439010304/STEM/c128131d-e5a2-4ce1-a711-7a076fb1f807.png?resizew=298)
21-22九年级上·黑龙江牡丹江·期末 查看更多[2]
更新时间:2022-01-07 13:56:19
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【推荐1】如图1,菱形
顶点
在
轴上,顶点
在反比例函数
上,边
交
轴于点
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
轴,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/20/588632c1-beda-4b8c-9207-e24db0ebc05e.png?resizew=388)
(1)求
.
(2)如图2,延长
交
轴于点
,问是否在该反比例函数上存在的点
,坐标轴上的点
,使得以
、
、
、
为顶点的四边形是平行四边形?若存在,直接写出所有满足条件的点
的坐标,若不存在请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9212e728b36c078188606c9d429389d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d58f4fa90e6a54c669aacf8f0b43caa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b27af7868ae7bfc55d597d44f8bfe30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/20/588632c1-beda-4b8c-9207-e24db0ebc05e.png?resizew=388)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)如图2,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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【推荐2】阅读材料:已知实数m、n满足
,求
的值.
解:设
,则原方程可化为(t+1)(t-1)=35,整理得t2-1=35,t2=36,
∴t=±6,
∵
,
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55f471e1e3121a150c9b08254cc66d5.png)
上面这种解题方法为“换元法”,在结构较复杂的数和式的运算中,若把其中某些部分看成一个整体,则能使复杂的问题简单化,根据“换元法”解决下列问题:
(1)已知实数x、y满足
,求
的值;
(2)若四个连续正整数的积为360,求这四个连续的正整数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e19291e2c6ee23e9eb201656f13962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb0ec917859cafb011b729c64c8273e5.png)
解:设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0ef62ef9edcea79ab75709c44a8a3fc.png)
∴t=±6,
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/552edb92747c6074fdc7e7fb3daf0cd0.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55f471e1e3121a150c9b08254cc66d5.png)
上面这种解题方法为“换元法”,在结构较复杂的数和式的运算中,若把其中某些部分看成一个整体,则能使复杂的问题简单化,根据“换元法”解决下列问题:
(1)已知实数x、y满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b302d2facff9020365de4366c2f34f81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dc635c799b3cbb6e33efcd016b1c735.png)
(2)若四个连续正整数的积为360,求这四个连续的正整数.
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【推荐1】如图,在平面直角坐标系中,已知点A(10,0),B(4,8),C(0,8),连接AB,BC,点P在x轴上,从原点O出发,以每秒1个单位长度的速度向点A运动,同时点M从点A出发,以每秒2个单位长度的速度沿折线A﹣B﹣C向点C运动,其中一点到达终点时,另一点也随之停止运动,设P,M两点运动的时间为t秒.
(1)求AB长;
(2)设△PAM的面积为S,当0≤t≤5时,求S与t的函数关系式,并指出S取最大值时,点P的位置;
(3)t为何值时,△APM为直角三角形?
(1)求AB长;
(2)设△PAM的面积为S,当0≤t≤5时,求S与t的函数关系式,并指出S取最大值时,点P的位置;
(3)t为何值时,△APM为直角三角形?
![](https://img.xkw.com/dksih/QBM/2018/3/13/1901144798281728/1904311950147584/STEM/d85254f48c684881bfdb675fcb87fb95.png?resizew=124)
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【推荐2】如图,直径
把圆
分为两个半圆,一个半圆弧上有一定点
,另一半圆弧上有一动点
.过
作
交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/9163a90b-7fb3-4fe7-bf83-e57f260e20a3.png?resizew=317)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880306fd534cdd317bbeb7021356c9a6.png)
(2)若
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d37a9fa9dd965f66e8a65ad9d58f95d.png)
①当点
运动到半圆弧
中点时,求
边
上的高;
②当点
运动到什么位置时,
的面积最大?并求这个最大面积
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afaafb8e40bcb2027d345f1a98f9727f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/9163a90b-7fb3-4fe7-bf83-e57f260e20a3.png?resizew=317)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880306fd534cdd317bbeb7021356c9a6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d37a9fa9dd965f66e8a65ad9d58f95d.png)
①当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab668019812e88533e210148e389091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
②当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab668019812e88533e210148e389091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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【推荐1】如图,是一个圆弧型拱桥的截面示意图.点
是拱桥
的中点,桥下水面的宽度
,点
到水面
的距离
.点
,
均在
上,
,且
,在点
,
处各装有一个照明灯,图中
和
分别是这两个灯的光照范围.两灯可以分别绕点
,
左右转动,且光束始终照在水面
上.即
,
可分别绕点
,
按顺(逆)时针方向旋转(照明灯的大小忽略不计),线段
,
在
上,此时,线段
是这两灯照在水面
上的重叠部分的水面宽度.
(2)求照明灯
距离水面的高度.
(3)已知
,在这两个灯的照射下,当整个水面
都被灯光照到时,求这两个灯照在水面
上的重叠部分的水面宽度.(可利用备用图解答)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/658072dab0daf57c18ba302b102f8347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74b7ce970eead63efb64c1adf1e7a740.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c2f2d8f57fc875ecb4b2d1d63daeb7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99a9b98d91ff79ad4bc06685ba514f60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05ee287f849b6e3ea6a128bff231d91f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0634fdb35d0088b31be41e186970f187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f85f08fcb24ba45c365f069afa95d5fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4121fc5d1c482935d1d26bc690fbcc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)求照明灯
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2aac99877b1afa971144d52cf45e6b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】如图1,在矩形ABCD中,AB=2,AD=
,E是CD边上的中点,P是BC边上的一点,且BP=2CP.
(1)求证:∠AED=∠BEC;
(2)判断EB是否平分∠AEC,并说明理由;
(3)如图2,连接EP并延长交AB的延长线于点F,连接AP,不添加辅助线,△PFB可以由都经过P点的两次变换与△PAE组成一个等腰三角形,直接写出两种方法(指出对称轴、旋转中心、旋转方向和平移距离).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)求证:∠AED=∠BEC;
(2)判断EB是否平分∠AEC,并说明理由;
(3)如图2,连接EP并延长交AB的延长线于点F,连接AP,不添加辅助线,△PFB可以由都经过P点的两次变换与△PAE组成一个等腰三角形,直接写出两种方法(指出对称轴、旋转中心、旋转方向和平移距离).
![](https://img.xkw.com/dksih/QBM/2019/6/20/2229528715395072/2230459448377344/STEM/4bd306c14eb44d39a7a63a4e9f07072b.png?resizew=310)
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【推荐1】我们定义:如果一个矩形
周长和面积都是
矩形的
倍,那么我们就称矩形
是矩形
的完全
倍体.
(1)若矩形
为正方形,是否存在一个正方形
是正方形
的完全
倍体?______(填“存在”或“不存在”).
【深入探究】长为
,宽为
的矩形
是否存在完全
倍体?
小鸣和小棋分别有以下思路:
【小鸣方程流】设新矩形长和宽为
、
,则依题意
,
,
联立
得
,再探究根的情况;
【小棋函数流】如图,也可用反比例函数
:
与一次函数
:
来研究,作出图象,有交点,意味着存在完全
倍体.
(2)那么长为4.宽为3的矩形
是否存在完全
倍体?请利用上述其中一种思路说明原因.
(3)如果长为4,宽为3的矩形
存在完全
倍体,请求出
的取值范围.
![](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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/22/5581e6a3-3eaa-4498-9865-0ff0e2e88f35.png?resizew=168)
(1)若矩形
![](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/61128ab996360a038e6e64d82fcba004.png)
【深入探究】长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
小鸣和小棋分别有以下思路:
【小鸣方程流】设新矩形长和宽为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83366dc77692c105cdfc99b028b18dfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdaf43a0b3ae4b8e6f1ba2ec8825ef4.png)
联立
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87da6c6c92b871b4a9f0a9c86fba8f58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f20c8658c823a5339c749b96b0948207.png)
【小棋函数流】如图,也可用反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3080b9d9aaace24823a0fd8eb469e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/057b64685403b7ab1ff14c5e7f7e1984.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
(2)那么长为4.宽为3的矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(3)如果长为4,宽为3的矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,在平面直角坐标系中,菱形ABCD的顶点D在y轴上,A,C两点的坐标分别为(2,0),(2,m),直线CD:y1=ax+b与双曲线:y2=
交于C,P
两点.
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987865426640896/2989965063495680/STEM/4fa1936088424124841074a77f9936a0.png?resizew=171)
(1)求双曲线y2的函数关系式及m的值;
(2)判断点B是否在双曲线上,并说明理由;
(3)若BA的延长线与双曲线y2=
交于另一点E,连接CE,DE,请直接写出△CDE的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/150f1dfec4b2eb9fcdeadb0b18d2c286.png)
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987865426640896/2989965063495680/STEM/4fa1936088424124841074a77f9936a0.png?resizew=171)
(1)求双曲线y2的函数关系式及m的值;
(2)判断点B是否在双曲线上,并说明理由;
(3)若BA的延长线与双曲线y2=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
您最近一年使用:0次