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Equation of the Parabola  TOPIC_SOLVED

1.) Find the equation of the parabola passing through (-4,-6) whose vertex at (-2,-4) and whose axis is parallel to x-axis. 2.)What is the equation of the parabola w/vertex at (2,6) and y=7 as directrix. Hope you guys can provide me answers and a step by step procedure on how to solve this one. Tha...
by alainjulius
on Sat Aug 17, 2013 12:41 am
 
Forum: Geometry
Topic: Equation of the Parabola
Replies: 1
Views: 1113

EQUATION OF ELLIPSE given directrix at y = ...  TOPIC_SOLVED

Find the equation of the ellipse given directrix at y = (9)(sqrt of 5)/5 + 2, center at (2, -6) and one
of the vertices on (2, -4).

Spent hours on this one. I don't know if this is possible to solve. Can't find solutions on any modules. Please help. Thank you so much.
by alainjulius
on Tue Oct 08, 2013 9:31 am
 
Forum: Geometry
Topic: EQUATION OF ELLIPSE given directrix at y = ...
Replies: 3
Views: 1609

Re: EQUATION OF ELLIPSE given directrix at y = ...  TOPIC_SOLVED

Hey, thanks for the reply. I just wanna ask how did you arrive on the equation 9(sqrt{5})/5 + 2 = 4/c?Also, I tried to solve for the c without actually looking at your solution and I didn't get to arrive at solving the c using quadratic formula. I cross-multiplied c to the left side so I end up with...
by alainjulius
on Wed Oct 09, 2013 2:43 am
 
Forum: Geometry
Topic: EQUATION OF ELLIPSE given directrix at y = ...
Replies: 3
Views: 1609

Re: EQUATION OF ELLIPSE given directrix at y = ...  TOPIC_SOLVED

ah I already understand the equation. I just wanna clarify your solution for arriving at the quadratic equation. thanks
by alainjulius
on Wed Oct 09, 2013 2:53 am
 
Forum: Geometry
Topic: EQUATION OF ELLIPSE given directrix at y = ...
Replies: 3
Views: 1609

COORDINATES OF LATERA RECTA

How do you get the coordinates of the ends of latera recta(latus rectum) of each conics or if there is some kind of a formula? parabola, ellipse ,hyperbola..thank you
by alainjulius
on Wed Oct 09, 2013 3:51 am
 
Forum: Geometry
Topic: COORDINATES OF LATERA RECTA
Replies: 1
Views: 865

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