1 . 在平面直角坐标系xOy中,设定点
,P是函数
图象上一动点.若点P,A之间的最短距离为
,求实数a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bdb225f362f150791f7483a96a18d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edeed0665fc1a8e99ceb7911fe137390.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
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2 . 如图,某油田计划在铁路线
一侧建造两家炼油厂
、
,同时在铁路线上建一个车站
,用来运送成品油.先从车站出发铺设一段垂直于铁道方向的公共输油管线
,再从
分叉,分别向两个炼油厂铺设管线
、
.图中各小写字母表示的距离(单位:千米)分别为
,
,
.设所有管线的铺设费用均为每千米7.2万元,公共输油管线长为
,总的输油管道长度为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/9d225c22-c71a-4ee3-b84c-4f65f4855630.png?resizew=255)
(Ⅰ)若
,请确定车站
的位置,使得总的输油管道长度为
最小,此时输油管线铺设费用是多少?
(Ⅱ)请问从降低输油管线铺设费用的角度出发,是否需要铺设公用管线.如果需要请给出能够降低费用管线铺设方案(精度为0.1千米).
(参考数据:
,
,
,
,
,
,
,
,
,
,
.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f6927cc2a930203ac34366383e76ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab839d8569171afab5ed55c22013aa72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/019eb94a6a2b38308811470d860e1a20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25640257dbcbd5ae48f87958ef79cb25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9336e207e7b70abf036176204d118267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c339e4a1e71a9829e340c88a48a3ef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/9d225c22-c71a-4ee3-b84c-4f65f4855630.png?resizew=255)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a882037b9ce104ecc496e0f31a139361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
(Ⅱ)请问从降低输油管线铺设费用的角度出发,是否需要铺设公用管线.如果需要请给出能够降低费用管线铺设方案(精度为0.1千米).
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3eeb65aaf62233164203f1b4d63b4cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246147e2682d5c6926953b2145699138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc3bfb0361a91cff5d2783f3d80e7907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c829b7d6d44ac7399212e3543449d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4bdd4cd4c9abc7d22455ddfde7b8a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abbf53d7a9ad6a22f65a9bfed50f0bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c296ee235df4dca2986b379d6dd7be6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f973b52a8769fb3b8ddf5f27812543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d84f0956692cae4eba3f557dcce9bc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8500fd4a1086303cd2c946a2a7b3b59c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef7d13b10e8981db87e500cc41f9f74.png)
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3 . 设复数
满足
,
.
(1)求
的值;
(2)设复数
和
在复平面上对应的点分别是
和
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad6df8d88afb4feb8eff603b8049c8f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/737692932c966f1ca7ec5263ab714b80.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
(2)设复数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8b9ad2fcfff3dd546c5fdbedfe6238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6985cd25388b37a12875f4b600cad483.png)
您最近一年使用:0次
2019-12-06更新
|
283次组卷
|
3卷引用:上海市青浦区2016-2017学年高二下学期期终学业质量调研数学试题
上海市青浦区2016-2017学年高二下学期期终学业质量调研数学试题(已下线)专题5.6 期末考前必做30题(解答题提升版)-2020-2021学年高二数学下学期期末专项复习(沪教版)四川省雅安中学2020-2021学年高二下学期期中考试数学(文)试题
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4 . 过点
的直线
分别交
与
于
、
两点.
(1)设
点的坐标为
,用实数
表示
点的坐标,并求实数
的取值范围;
(2)设
的面积为
,求直线
的方程;
(3)当
最小时,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5de78b493bc2cc9696c584325c22ee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed8d4fd5c2cda8b9bea800b06cfa7c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a78aec8eefcb853baff07a50a6e987e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c2e275d7c2b1f7e42ba36a87fb050cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd2981bf2261343f905ec1b5355a3c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a316c27ccf35e5e9b4294364985927dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/559d66fd8b309fd440ce9bda78a579c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2019-11-15更新
|
1211次组卷
|
3卷引用:上海市曹杨二中2017-2018学年高二下学期开学摸底考数学试题
上海市曹杨二中2017-2018学年高二下学期开学摸底考数学试题浙江省温州市龙湾中学2021-2022学年高二上学期第一次阶段性检测数学试题(1-10班)(已下线)难关必刷02直线与方程-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(人教A版2019选择性必修第一册)
5 . 若以
为一个顶点,试在
轴上找一点B,另在直线
上找一点C,使构成的
的周长最小,并求出此时
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c17ff5e0a917684d41cd41e0ae303308.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feb31826e94cde6199ed7f93139f3e17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2019-10-11更新
|
55次组卷
|
2卷引用:第三章 第三节 3.3 直线的交点坐标与距离公式
6 . 已知两定点
,
及两平行直线
,
,试在直线
,
上分别求出点P,Q,使得
,且折线段APQB的长度最短,并写出此时三条折线所在直线的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bac973682400bba7f0762f3ba7d9b285.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6063fbeaf209d65be3c088fcb6bb2be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f1738a71235b8380353c25e21b877f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee07ae0ca966e2bae57734f9977fab2e.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/8966c9cc4fa4ff537a546bcd0b055554.png)
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7 . 已知在平面直角坐标系中,直线l过点P(1,2).
(1)若直线l在x轴和y轴上的截距相等,求直线l的方程;
(2)求坐标原点O到直线l距离取最大值时的直线l的方程;
(3)设直线l与x轴正半轴、y轴正半轴分别相交于A,B两点,当|PA|•|PB|最小时,求直线l的方程.
(1)若直线l在x轴和y轴上的截距相等,求直线l的方程;
(2)求坐标原点O到直线l距离取最大值时的直线l的方程;
(3)设直线l与x轴正半轴、y轴正半轴分别相交于A,B两点,当|PA|•|PB|最小时,求直线l的方程.
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2018高一上·全国·专题练习
8 . 已知点
,在直线
和
上各找一点
和
,使
的周长最短,并求出最短周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96ef7e9efc2681546f2320b108a1987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a7df955fc17e92fd86302f8c34664a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
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9 . 已知M(1,0)、N(-1,0),点P为直线2x-y-1=0上的动点,求PM2+PN2的最小值及取最小值时点P的坐标.
您最近一年使用:0次
2018-09-25更新
|
408次组卷
|
4卷引用:黑龙江省黑河市第一中学2017-2018学年高一下学期人教A版数学必修二3.2直线与方程课时练习
黑龙江省黑河市第一中学2017-2018学年高一下学期人教A版数学必修二3.2直线与方程课时练习人教B版(2019) 选修第一册 北京名校同步练习册 第二章 平面解析几何初步 2.1坐标法(已下线)模块三 专题7 直线的交点坐标与距离 B能力卷(已下线)模块三 专题10 两条直线的位置关系和距离公式 B能力卷
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10 . 直线
过点
,且分别交
轴的正半轴和
轴的正半轴于
两点,
为坐标原点.
①当
最小时,求
的方程;
②若
最小,求
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/915651fc9cdae8de0bf6fddbaad641d8.png)
![](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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8a99d2c4a23825f62aadcc40822b5eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/559d66fd8b309fd440ce9bda78a579c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2018-08-25更新
|
1742次组卷
|
2卷引用:江西省赣州市南康中学2017-2018学年高一下学期第三次月考数学(理)试题