百度试题 结果1 题目 An ellipse with equation x(a^2)+ y(b^2)=1 has focus (3,0) and the equation of the directrix is x=12 Find the values of a and b. 相关知识点: 试题来源: 解析 a=6, b=3√ 3 反馈 收藏
___ (2)If 4p = 4, then the coordinates of the focus are ___. (3)If 4p = 4, then the equation of the directrix is ___. (4)If 4p = 4, then the length of the latus rectum is ___.The endpoints of the latus rectum are ___ and ___....
Find the equation of the parabola with focus(−3,0)and the equation of the directrix is x = 3. Find the equation of the parabola with focus (7, 0) and equation of the directrix is x = -7. View Solution FInd the equation of the parabola The focus at (1,1) the directrixx−y...
The equation of the directrix of the parabola 25{(x−2)2+(y+5)2}=(3x+4y−1)2, is A3x+4y=0 B3x+4y-1=0 C4x-3y=0 D3x+4y+1=0Submit Question 2 - Select One If the area (in sq. units) bounded by the parabola y2=4λx and the line y=λx,λ>0, is 19, then λ ...
while the equation of the directrix is given by $$x = p $$ Answer and Explanation:1 First, rewrite the given equation of the parabola: $$\begin{align} y^{2} + 12x & = 0 \\[0.2 cm] y^{2} & = -12x \\[0.2 cm] y^{2} & = -4(...
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); ...
Here (x,y) are the coordinates of the vertex and |p| is the focal distance. And The coordinates of the focus: F(p+h,k) and The equation of the directrix: x=−p+h.Answer and Explanation: The given equation of the parabola: x=14(y2+2...
For each of the two parabolas determine (a) The coordinates of the vertex, (b) The coordinates of the focus, (c) The equation of the directrix, (d) The equation of the axis of symmetry. Sketch each... Explain how you would decide whether to record each of the following expenditures ...
If the axis of a parabola is horizontal, and the vertex is at (h, k), the equation becomes(y − k)2 = 4p(x − h)xy(h, k)x = 2focus:directrix:Open image in a new page Parabola (y − k)2 = 4p(x − h)In the above case, the axis of symmetry is the horizontal ...
Sketch the graph and determine the coordinates for the focus and the equation of the directrix for the parabola given by the equation y^2 = -8/3 x. 8. Let C be the portion of the parabola x = y^{2} between the points (1,1) and (4,2). Compute \int_C \vec{F} d\vec{r}...