已知拋物线
经过
和点
.
(1)求抛物线的表达式;
(2)若
的半径为1,圆心P在抛物线上运动,
在运动过程中,是否存在与坐标轴相切的情况?若存在,请求出圆心P的坐标;若不存在,请说明理由;
(3)若
的半径为r,圆心Q在抛物线上,当
与两坐标轴都相切时,求半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896a8bea63235cf421b40f1b414b1e9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22340d6f2582502d69a5cb85f446ff43.png)
(1)求抛物线的表达式;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1d9218917d85a1dc19e60f076b8bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1d9218917d85a1dc19e60f076b8bfa.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52bba9798c625c7cd778636bceea32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52bba9798c625c7cd778636bceea32.png)
更新时间:2024-05-24 16:07:17
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐2】用适当的方法解下列方程
(1)3x(x-2)=x-2
(2)4t2 = l2t+l(用配方法)
(3)
(1)3x(x-2)=x-2
(2)4t2 = l2t+l(用配方法)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03926fca38d772d1102b6679647e2d6f.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】已知抛物线
与
轴交于点
,顶点为
.
(1)当
,
时,求抛物线的顶点
的坐标;
(2)求抛物线
与
轴的另一个交点的坐标(用含
,
的式子表示);
(3)若经过点
的直线
与抛物线
交于点
,求直线
与
轴和
轴所围成的三角形的面积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86711a4a75a83b18b90b75ee1ce68397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8748dc55e2f45bc37fc4d84d7310f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/204696a289b1f47a176eb16c1cecf8b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(3)若经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a58548d8866b0487b14e33690fb80aa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/204696a289b1f47a176eb16c1cecf8b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d9675ceaa48c33d0e4f4d7bfed3a263.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】在平面直角坐标系xOy中(如图),已知抛物线y=x2 - bx+c经过A(-1.2)、B(0,-1)两点.
![](https://img.xkw.com/dksih/QBM/2022/4/19/2961619307782144/2962733792903168/STEM/0a658a84-bd19-4fcd-b1da-52d70cef4e2a.png?resizew=174)
(1)求抛物线的表达式及顶点P的坐标;
(2)将抛物线y=x2 - bx+c向左平移(
+1)个单位,设平移后的抛物线顶点为点P'.
①求∠BP'P的度数;
②将线段P'B绕点B按逆时针方向旋转150°,点P’落在点M处,点N是平移后的抛物线上的一点,当△MNB的面积为1时,求点N的坐标.
![](https://img.xkw.com/dksih/QBM/2022/4/19/2961619307782144/2962733792903168/STEM/0a658a84-bd19-4fcd-b1da-52d70cef4e2a.png?resizew=174)
(1)求抛物线的表达式及顶点P的坐标;
(2)将抛物线y=x2 - bx+c向左平移(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
①求∠BP'P的度数;
②将线段P'B绕点B按逆时针方向旋转150°,点P’落在点M处,点N是平移后的抛物线上的一点,当△MNB的面积为1时,求点N的坐标.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在平面直角坐标系xOy中,直线y=kx+3分别交x轴、y轴于A,B两点,经过A,B两点的抛物线y=﹣x²+bx+c与x轴的正半轴相交于点C(1,0).
![](https://img.xkw.com/dksih/QBM/2022/9/10/3063290439385088/3066776959025152/STEM/d960673b4e804cc0a2554ac85833a295.png?resizew=155)
(1)求抛物线的解析式;
(2)求直线AB的方程;
(3)若P为线段AB上一动点,过P作y轴的平行线交抛物线于M,求线段PM长的最大值.
![](https://img.xkw.com/dksih/QBM/2022/9/10/3063290439385088/3066776959025152/STEM/d960673b4e804cc0a2554ac85833a295.png?resizew=155)
(1)求抛物线的解析式;
(2)求直线AB的方程;
(3)若P为线段AB上一动点,过P作y轴的平行线交抛物线于M,求线段PM长的最大值.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知二次函数
的图象与
轴分别交于
、
两点,与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/86e50479-cd22-411d-8e60-b5c6eb2dfd1f.png?resizew=158)
(1)求该二次函数图象的顶点坐标;
(2)分别连接
、
,求
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/321963053a11a42e3d3ad19628c27abe.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://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/86e50479-cd22-411d-8e60-b5c6eb2dfd1f.png?resizew=158)
(1)求该二次函数图象的顶点坐标;
(2)分别连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
真题
【推荐1】 如图,在菱形
中,点
在对角线
上,且
,
是
的外接圆.
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647425024/STEM/41552fbb9c6a47d0bd0d3fab7edd817c.png)
(1)求证:
是
的切线;
(2)若
求
的半径.
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647425024/STEM/b0ebadfdcfe84918a7d3883ff758167f.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647425024/STEM/df1d09e7bd914b62985a1bfbd8e2c160.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647425024/STEM/358c8b0d225a4ee48668a97bbfbd1373.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647425024/STEM/65da3c9f4b5d409c812490b2371b1665.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647425024/STEM/231193ff758b45bba86675394ba01fc4.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647425024/STEM/1da4f0b649824e4cb533fc960020255d.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647425024/STEM/41552fbb9c6a47d0bd0d3fab7edd817c.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647425024/STEM/cb631d86921a42358391ef891339c566.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647425024/STEM/231193ff758b45bba86675394ba01fc4.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647425024/STEM/f03cbe2594c34386aacffb4630634b47.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773762647220224/1773762647425024/STEM/231193ff758b45bba86675394ba01fc4.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
真题
【推荐2】如图,
是⊙
的直径,
与⊙
相切于点
,连接
交⊙
于点
.连接
.
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761142300672/1773761142693888/STEM/acb533dda4be4355b3c8665f2d722140.png?resizew=126)
(1)求证:
;
(2)求证:
;
(3)当
时,求
的值.
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761142300672/1773761142693888/STEM/f1197ac743d644fe8d328e6cc91d4461.png?resizew=27)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761142300672/1773761142693888/STEM/95c69e607a724a28b0eead6bea503533.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761142300672/1773761142693888/STEM/b96c8a33acd646c0ace3e7d6a6c5d2f1.png?resizew=25)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761142300672/1773761142693888/STEM/95c69e607a724a28b0eead6bea503533.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761142300672/1773761142693888/STEM/46043e6f079d49818fd37bc60aebadc7.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761142300672/1773761142693888/STEM/4f53915d119841a98c8b88f095f3cf5c.png?resizew=25)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761142300672/1773761142693888/STEM/95c69e607a724a28b0eead6bea503533.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761142300672/1773761142693888/STEM/e3405a7fe03a4dc0ab9d6d7b5158c9af.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761142300672/1773761142693888/STEM/7253804bebb245e6aa164064cd2b3ea0.png?resizew=27)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761142300672/1773761142693888/STEM/acb533dda4be4355b3c8665f2d722140.png?resizew=126)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761142300672/1773761142693888/STEM/16fa1dfc9a4f4dfe9af2ed28fab5c2c5.png?resizew=107)
(2)求证:
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761142300672/1773761142693888/STEM/9a11c094f0a34600bd3f1e06744fa0e9.png?resizew=99)
(3)当
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761142300672/1773761142693888/STEM/b5f506c11dd4464a822899eb65ab503c.png?resizew=101)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761142300672/1773761142693888/STEM/05d11f8595a946bd82c5793499a38911.png?resizew=68)
您最近一年使用:0次