如图1,平面直角坐标系中,直线
交x轴于点
,交y轴正半轴于点B,直线AC交y轴负半轴于点C,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/5d7ea0b4-ad90-4b7a-9fe2-848fa61714a6.png?resizew=176)
(1)求
的面积.
(2)P为线段 AB(不含A,B两点)上一动点.
①如图2,过点P作y轴的平行线交线段AC于点Q,记四边形APOQ的面积为S,点P的横坐标为t,当
时,求t的值.
②M为线段BA延长线上一点,且
,在直线AC上是否存在点N,使得
是以PM为直角边的等腰直角三角形?若存在,直接 写出点N的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e1091fb901674a0b7c73a104e9657d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4fd4da08956db1f206c8ea026f4e52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1be86349e06431647f8e359d9bd07700.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/0a58ca24-be7e-4d54-b12c-4fa21b23066d.png?resizew=178)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/3cfad8a4-c795-4776-8776-bc0610bc4ff5.png?resizew=176)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/5d7ea0b4-ad90-4b7a-9fe2-848fa61714a6.png?resizew=176)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)P为
①如图2,过点P作y轴的平行线交线段AC于点Q,记四边形APOQ的面积为S,点P的横坐标为t,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/308a31443e11f83d3f06f1dd91a73204.png)
②M为线段BA延长线上一点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1369d71cf85a656152073e2aef91a837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
更新时间:2021-01-07 15:06:11
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相似题推荐
解答题-问答题
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【推荐1】如图,已知直线
:
和直线
:
,过点
作
轴,交直线
于点A,若点P是x轴上的一个动点,过点P作平行于y轴的直线,分别与
、
交于点C、D,连接AD、BC.
![](https://img.xkw.com/dksih/QBM/2019/4/13/2181679185846272/2184538012721152/STEM/f84e7d0508c84d38bc7b008108162672.png?resizew=407)
直接写出线段
______;
当P的坐标是
时,求直线BC的解析式;
若
的面积与
的面积相等,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cdc3ca1ef473a3801e749fa6cc8ead9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177526213ed7591ca8194c77a0be8557.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1ddd106a56c2519766f131b244c62b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fcd0ce14f319a4fef693361559a037d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa907fa91c5cdd304a21fe1d2467ee5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1243b9364c4ecff756d06a5591de2555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cdc3ca1ef473a3801e749fa6cc8ead9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cdc3ca1ef473a3801e749fa6cc8ead9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1ddd106a56c2519766f131b244c62b3.png)
![](https://img.xkw.com/dksih/QBM/2019/4/13/2181679185846272/2184538012721152/STEM/f84e7d0508c84d38bc7b008108162672.png?resizew=407)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70c63bb552aa1e13f6f49bc0be384861.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39ed4cb2142dc0079cc4fe4b660558f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4bb89a362c1faf4d0c306eabbb59710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882589c896c6993d9687f0e14a283481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/979f11f390f6befe07aee15c03b43676.png)
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【推荐2】如图1,平面直角坐标系中,直线
与x轴、y轴分别交于点A,B,直线y=-x+b经过点A,并与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/2022/9/20/3070627243016192/3072684840460288/STEM/8d8c14a5f73c4bc9896aeab221c30479.png?resizew=359)
(1)求A,B两点的坐标及b的值;
(2)如图2,动点P从原点O出发,以每秒1个单位长度的速度沿x轴正方向运动.过点P作x轴的垂线,分别交直线AC,AB于点D,E.设点P运动的时间为t,点D的坐标为________,点E的坐标为________;(均用含t的式子表示)
(3)在(2)的条件下,当点P在线段OA上时,探究是否存在某一时刻,使DE=OB?若存在,求出此时△ADE的面积;若不存在说明理由.
(4)在(2)的条件下,点Q是线段OA上一点.当点P在射线OA上时,探究是否存在某一时刻使DE=
?若存在、求出此时t的值,并直接写出此时△DEQ为等腰三角形时点Q的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24edd2a1d145627d07330524017daf5c.png)
![](https://img.xkw.com/dksih/QBM/2022/9/20/3070627243016192/3072684840460288/STEM/8d8c14a5f73c4bc9896aeab221c30479.png?resizew=359)
(1)求A,B两点的坐标及b的值;
(2)如图2,动点P从原点O出发,以每秒1个单位长度的速度沿x轴正方向运动.过点P作x轴的垂线,分别交直线AC,AB于点D,E.设点P运动的时间为t,点D的坐标为________,点E的坐标为________;(均用含t的式子表示)
(3)在(2)的条件下,当点P在线段OA上时,探究是否存在某一时刻,使DE=OB?若存在,求出此时△ADE的面积;若不存在说明理由.
(4)在(2)的条件下,点Q是线段OA上一点.当点P在射线OA上时,探究是否存在某一时刻使DE=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b64dc1ab9bf65cfdaac7633e9a7958ff.png)
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【推荐3】【模型建立】
如图,已知直角△ABC中,∠ACB=90°,AC=CB,过点C任作一条直线l(不与CA、CB重合),过点A作AD⊥l于D,过点B作BE⊥l于E,易证△ACD≌△CBE,进一步得到全等三角形的对应线段和对应角分别相等,这一证明在平面直角坐标系中也被广泛使用.
![](https://img.xkw.com/dksih/QBM/2022/1/16/2895705203744768/2919100316098560/STEM/542d00931e284639b251d4ad69cd3838.png?resizew=407)
【模型应用】
(1)如图1,若一次函数y=-x+6的图像与x轴、y轴分别交于A、B两点.若点B到经过原点的直线l的距离BE的长为4,求点A到直线l的距离AD的长;
(2)如图2,已知直线y=
x+4与y轴交于B点,与x轴交于A点,过点A作AC⊥AB于A,截取AC=AB,过B、C作直线,求直线BC的解析式;
【模型拓展】
(3)如图3,平面直角坐标系中,在△ACB中,∠ACB=90°,AC=BC,AB于y轴交于点D,点C的坐标为(0,-4),A点的坐标为(8,0),求B、D两点的坐标.
如图,已知直角△ABC中,∠ACB=90°,AC=CB,过点C任作一条直线l(不与CA、CB重合),过点A作AD⊥l于D,过点B作BE⊥l于E,易证△ACD≌△CBE,进一步得到全等三角形的对应线段和对应角分别相等,这一证明在平面直角坐标系中也被广泛使用.
![](https://img.xkw.com/dksih/QBM/2022/1/16/2895705203744768/2919100316098560/STEM/542d00931e284639b251d4ad69cd3838.png?resizew=407)
【模型应用】
(1)如图1,若一次函数y=-x+6的图像与x轴、y轴分别交于A、B两点.若点B到经过原点的直线l的距离BE的长为4,求点A到直线l的距离AD的长;
(2)如图2,已知直线y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
【模型拓展】
(3)如图3,平面直角坐标系中,在△ACB中,∠ACB=90°,AC=BC,AB于y轴交于点D,点C的坐标为(0,-4),A点的坐标为(8,0),求B、D两点的坐标.
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【推荐1】【问题情境】
在
中,
,点
为
所在直线上的任一点,过点
作
,
,垂足分别为
,
,过点
作
,垂足为
.当
在
边上时(如图
),求证:
.
证明思路是:如图
,连接
,由
与
面积之和等于
的面积可以证得:
.(不要证明)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/f0e71d1d-eff5-46e4-928c-d70350b80020.png?resizew=281)
(1)【变式探究】
当点
在
延长线上时,其余条件不变(如图
).试探索
,
,
之间的数量关系并说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/2c61835e-b1e8-427b-a519-d679286d1787.png?resizew=180)
(2)请运用上述解答中所积累的经验和方法完成下列两题:
①【结论运用】
如图
,将长方形
沿
折叠,使点
落在点
上,点
落在点
处,点
为折痕
上的任一点,过点
作
,
,垂足分别为
,
,若
,
,求
的值.
②【迁移拓展】
在直角坐标系中,直线
与直线
相交于点
,直线
,
与
轴分别交于点
、点
.点
是直线
上一个动点,若点
到直线
的距离为
,求点
的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/dc72abdb-1ef4-483e-81c1-a10a196fcdc7.png?resizew=224)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545e18836bc7fee22f8f813a6f525d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bc56fdf70e65bd88980c64af96b83da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e68633cbbe3cc2d0801305f81a7aa86.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a19013afb0d8fa40a1b20bcfdfea2554.png)
证明思路是:如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147de24f071e316b68fd2e78e3c84545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a19013afb0d8fa40a1b20bcfdfea2554.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/f0e71d1d-eff5-46e4-928c-d70350b80020.png?resizew=281)
(1)【变式探究】
当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/2c61835e-b1e8-427b-a519-d679286d1787.png?resizew=180)
(2)请运用上述解答中所积累的经验和方法完成下列两题:
①【结论运用】
如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf6d494cddbc41b0e4249cfbf9c596f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/326bf956f690351008afb65d871da838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bef7eab528a8dd3e3f328de3b3ac80ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ce84f6062f12bf6ef42d7b733cd2248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49528bd97b016d6a3b2c015e76e120cd.png)
②【迁移拓展】
在直角坐标系中,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e43db9863a296b8e3c7820293fd6ef01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59c5ea38f1ae3b3c61ef90a013e6628c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/dc72abdb-1ef4-483e-81c1-a10a196fcdc7.png?resizew=224)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/92c32f65-1b07-4f9a-816c-55615028efe8.png?resizew=196)
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【推荐2】如图,△ABC中,∠ACB=90°,AC=2,BC=1.点A、C分别在x轴和y轴的正半轴上,当点A在x轴上运动时,点C也随之在y轴上运动.在整个运动过程中,求点B到原点的最大距离.
![](https://img.xkw.com/dksih/QBM/2021/3/28/2687866542309376/2688222486568960/STEM/89fcadfa-50e9-4ceb-a372-4378a0a705b0.png?resizew=257)
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【推荐1】如图,已知二次函数
的图像与坐标轴交于点
和点
.
![](https://img.xkw.com/dksih/QBM/2020/6/27/2493533917921280/2494451464470528/STEM/e7a6b40d-5519-44ea-ba93-e400639d2250.png)
(1)求该二次函数的解析式;
(2)已知该函数图像的对称轴上存在一点
,使得
的周长最小.请求出点
的坐标;
(3)在(2)的条件下,在
轴上找一点
,使得
是等腰三角形,请直接写出所有符合条件的点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530a9976281288e0b1e1fb2601ebf18e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a40a949338b458d8004449ae9bc1234.png)
![](https://img.xkw.com/dksih/QBM/2020/6/27/2493533917921280/2494451464470528/STEM/e7a6b40d-5519-44ea-ba93-e400639d2250.png)
(1)求该二次函数的解析式;
(2)已知该函数图像的对称轴上存在一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2694c32ca1e120e988012b7ecd74f625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)在(2)的条件下,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b6bddd82c0a71643253ce996a44f28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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,直线
分别交x轴、y轴于点A,C,直线
过点C交x轴于点B,且
,
,点P是直线
上的一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/9/4bc808b2-93e8-4ac2-9531-80fdefbfbc79.png?resizew=518)
(1)求直线
的解析式;
(2)若动点P从点B出发沿射线
方向匀速运动,速度为
个单位长度/秒,连接
,设
的面积为S,点P的运动时间为t秒,求S与t之间的函数关系式,并写出t的取值范围;
(3)若点Q是直线
上且位于第三象限图象上的一个动点,点M是y轴上的一个动点,当以点B、 M、Q为顶点的三角形为等腰直角三角形时,求点Q和点M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682b383aceb4c979b3d3330beb6e39b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d36b7c87eb10d99ece03275295107315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ae3be6b61f47adec52270491b3a148.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/9/4bc808b2-93e8-4ac2-9531-80fdefbfbc79.png?resizew=518)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)若动点P从点B出发沿射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
(3)若点Q是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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