Learn to find the equation of a parabola given its focus and directrix. Understand the standard equation of a parabola and learn to solve related...
What is the focus and directrix of a parabola? A parabola is defined to be the set of all points which are the same distance from its focus and directrix. Where is the focus of a parabola? The focus of a parabola given in vertex form y = a(x-h)^2 ...
Find the coordinates of the vertex and focus, then find the equation of the directrix for the given equation.x − 4x − 2y = 0Vertex :Focus :Directrix : 相关知识点: 试题来源: 解析 Vertex : (2,−2); Focus : (2,−PD=12); Directrix : y = −PD=12Vertex : (2,−2); ...
Find the coordinates of the vertex and focus, then find the equation of the directrix for the given equation.x= − 4x − 2y = 0Vertex :Focus :Directrix : 相关知识点: 试题来源: 解析 Vertex : (2,−2); Focus : (2,−); Directrix : y = −Vertex : (2,−2); Focus ...
某抛物线，其焦点为(2,-3)，其准线为x = 6，求标准方程。选B。抛物线基础知识。
5. Focus and Directrix In the context of conic sections, the focus is a fixed point through which all light rays parallel to the axis of symmetry will reflect off the parabola. The directrix is a fixed line perpendicular to the axis of symmetry. 6. Latus Rectum The latus rectum, or foca...
the focus of a parabola determination of the focus and directrix of a parabola whose equation is given with numerical coefficients 来自 dx.doi.org 喜欢 0 阅读量: 40 作者: Lawrence DOI: 10.2307/3608021 年份: 2019 收藏 引用 批量引用 报错 分享 ...
Directrix & Focus of a Parabola | Equation & Examples from Chapter 5/ Lesson 1 37K The directrix and focus of a parabola determine its shape, size, and direction. There is a formula for finding the directrix and focus. Examples are included. ...
Find the vertex, the focus and equation of the directrix for the parabola whose equation is {eq}y^{2} + 12x = 0 {/eq}. Properties of Parabola: In conic sections, a parabola is a locus of a point that moves in such a manner so that the dist...
(Mathematics) a conic section formed by the intersection of a cone by a plane parallel to its side. Standard equation:y2= 4ax, where 2ais the distance between focus and directrix [C16: via New Latin from Greekparabolēa setting alongside; see parable] ...