名校
1 . 已知抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97afdeaa1d4433cffe5005446fcbbbb.png)
,过焦点F的直线l与抛物线交于S,T,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/11c4f48f-a06f-431f-8779-6966df187d6e.png?resizew=187)
(1)求抛物线C的方程;
(2)设点P是x轴下方(不含x轴)一点,抛物线C上存在不同的两点A,B满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/203f6ea7bd3319d450fd957137942573.png)
,其中
为常数,且两点D,E均在C上,弦AB的中点为M.
①若点P坐标为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb3d32f46af3841f098c82e30ec1462.png)
,抛物线过点A,B的切线的交点为N,证明:点N在直线MP上;
②若直线PM交抛物线于点Q,求证;
为定值(定值用
表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97afdeaa1d4433cffe5005446fcbbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75ed10db4b9747a4b6d865b774f6b6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3405289647ead6ef2e86bc2e29a29b2d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/11c4f48f-a06f-431f-8779-6966df187d6e.png?resizew=187)
(1)求抛物线C的方程;
(2)设点P是x轴下方(不含x轴)一点,抛物线C上存在不同的两点A,B满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/203f6ea7bd3319d450fd957137942573.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c306bcfd9225ab3637e3f307161e8f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
①若点P坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb3d32f46af3841f098c82e30ec1462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfec4233214c3a729c843dee0d186db.png)
②若直线PM交抛物线于点Q,求证;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/184d0e916ff15d13036d0c40905ab22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2020-01-31更新
|
222次组卷
|
4卷引用:重庆市沙坪坝区南开中学校2019-2020学年高二上学期期末数学试题
重庆市沙坪坝区南开中学校2019-2020学年高二上学期期末数学试题重庆市南开中学2019-2020学年高二上学期期末数学试题(已下线)【新东方】高中数学20210304-003(已下线)【新东方】高中数学20210323-002【高二上】
名校
2 . 已知椭圆
:
的右焦点为
,过点
作
轴的垂线交椭圆
于点
.过点
作椭圆
的切线,交
轴于点
.
(1)求点
的坐标;
(2)过点
的直线(非
轴)交椭圆
于
、
两点,过点
作
轴的垂线与直线
交于点
,求证:线段
的中点在定直线上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0dfb290b1a84f670549554a0c988593.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
3 . 已知抛物线
:
与双曲线
:
相交于点
.
(1)若
,求抛物线
的准线方程;
(2)记直线l:
与
、
分别切于点M、N,当p变化时,求证:
的面积为定值,并求出该定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3a4f9f9ae0a23a09a780f3073d132a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b79ca81f286d8aeed52f91ee13ce0d8.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8faa47316e8d6c9631775a9d170bd26e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)记直线l:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.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/ab2ca3d56b93b5f218eaebb87045cd2b.png)
您最近一年使用:0次
名校
解题方法
4 . 已知双曲线
的一条渐近线方程为
,右焦点F到渐近线的距离为
.
(1)求双曲线C的标准方程;
(2)若双曲线上动点Q处的切线交C的两条渐近线于A,B两点,其中O为坐标原点,求证:
的面积S是定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45cc81cfaccc00aa4b7139de5a35a102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)求双曲线C的标准方程;
(2)若双曲线上动点Q处的切线交C的两条渐近线于A,B两点,其中O为坐标原点,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
您最近一年使用:0次
2024-03-23更新
|
1490次组卷
|
3卷引用:重庆市西南大学附属中学校2023-2024学年高三下学期全真模拟集训(一)数学试题
名校
解题方法
5 . 已知椭圆
:
,焦点为
,
,椭圆上有一点
.
(1)求椭圆
的标准方程;
(2)过点
的直线交椭圆
于
,
两点,过
作
轴的垂线交椭圆于另一个点
,求证直线
过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28bda5b4d2df3a2373e72cb39b33ce85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae470fe8ca2025aa7a55e53e2ab254d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c022a0f489482baa4b515de1b1a9a8b7.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
您最近一年使用:0次
6 . 已知
,
,直线l:
,动点P到l的距离为d,满足
,设点P的轨迹为C,过点F作直线
,交C于G,H两点,过点F作与
垂直的直线
,直线l与
交于点K,连接AG,AH,分别交直线l于M,N两点.
(1)求C的方程;
(2)证明:
;
(3)记
,
的面积分别为
,
,四边形AGKH的面积为
,求
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52d743a88d9d8aba9a3887a3638375e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6bbbb53aaeab0ab7a242228cc510fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/051be09b4e835cf68f624541a843018d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b99ef417ec17cd7c7caf2b17ee00bc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.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/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(1)求C的方程;
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1deb868aceb01c55bf8d859871a20ff6.png)
(3)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e72388cdb40f730d3a8fed7d61fba14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ffa4f0665d2a639b540b950dda3e5c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a7b29bde8f4bdcc610618087398df91.png)
您最近一年使用:0次
解题方法
7 . 已知双曲线
的左、右焦点分别为
,过
作直线
交双曲线右支于
两点,当直线
与
轴垂直时,
.过
作直线
分别交双曲线两支于
两点,且
的最小值为
.
(1)求双曲线
的方程;
(2)设线段
的中点分别为
,记
的面积为
,
的面积为
(
为双曲线的中心),若直线
的斜率分别为
且
,求证:
为定值,并求出这个定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a2cfa22139b3e9c9a73500e1ba19f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69c559671a60d864715ed73729020f0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316699c45f1c088945d0cd3bb46eecfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10e8abf8690e4b129466ddb918bcc94.png)
(1)求双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ea1c3fe8431260ecb8dffcdae8d570.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0276c0122da9760aaa627ac83465e36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
您最近一年使用:0次
2024高三·全国·专题练习
解题方法
8 . 已知抛物线
的焦点和椭圆
的右焦点相同,点
的坐标分别为
是抛物线上的点,设直线
与抛物线的另一交点分别为
.
(1)求抛物线的标准方程;
(2)求证:当点
在抛物线上变动时(只要点
存在,且点
与点
不重合),直线
恒过定点,并求出定点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c64cae1ba15d5030ef62460bbc708af4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55fb7ec4aa413693f4ecae59fe0e2084.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666e81326945f168fc30291f1bb2fc10.png)
(1)求抛物线的标准方程;
(2)求证:当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666e81326945f168fc30291f1bb2fc10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
您最近一年使用:0次
2024-01-30更新
|
634次组卷
|
3卷引用:重庆市部分学校2023-2024学年高二下学期4月阶段检测数学试题
9 . 在平面直角坐标系
中,已知抛物线
的焦点
与椭圆
的一个焦点重合,
是抛物线
上位于
轴两侧不对称的两动点,且
.
(1)求证:直线
恒过一定点
,并求出该点坐标;
(2)若点
为
轴上一定点,且
;
(ⅰ)求出
点坐标;
(ⅱ)过点
作平行于
轴的直线
,在
上任取一点
作抛物线
的两条切线,切点为
,
,求
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf92a1ba410263d4f68b7e0432b19aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5f50a539c4318d9749d371dfd9d284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4abdcc3d02baa36a2d2ffc5106719a61.png)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dead7389238047959fc220801fd58caa.png)
(ⅰ)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(ⅱ)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c28abb154f41e1ca9816c9c9c2433ca.png)
您最近一年使用:0次
10 . 已知椭圆
的离心率为
且过点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83872ef423683a1202475a4dd85c181d.png)
(1)求
的方程;
(2)若点
在
上,在下面两个问题中选择一个,并作答.
①若
证明直线
经过定点.
②若直线
的倾斜角互补,证明直线
的斜率为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/143e0b6bdc1a1f166dfb6cbe7be22c21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b539461f24fa61751b7e6ac653aaad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83872ef423683a1202475a4dd85c181d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f44755c5fee4b90266eac73ad47a128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5885627706e1a9c7560ca6b425340e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
②若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc3fa649ed4e64c9c4df31f98ff53248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次