# Help Analytical Geometry

Discussion in 'Homework Help' started by MrYu, Jan 22, 2013.

1. ### MrYu Thread Starter Member

Sep 26, 2011
42
0
if the distance from the focus to a point P on the parabola y^2 = 4px is 10, find the coordinate of p.

how to get the coordinates of P? tnx

what is the equation?

Last edited: Jan 23, 2013
2. ### WBahn Moderator

Mar 31, 2012
18,087
4,917
If p a point (i.e., an x,y pair) or is it a parameter? You have y^2 = 4px implying that p is a parameter (a single number). Please clarify.

Setting that aside, consider the following questions in general:

What are the coordinates of the focus of the parabola?

What is the distance from that point to an arbitrary point on the parabola?

What point(s) on the parabola are satisfy the desired distance.

3. ### MrYu Thread Starter Member

Sep 26, 2011
42
0
up..............

4. ### WBahn Moderator

Mar 31, 2012
18,087
4,917
That's not providing much additional information.

5. ### bountyhunter Well-Known Member

Sep 7, 2009
2,498
507
My humble suggestion would be this: instead of trying to "find an equation" to plug a number into and get another number, you might want to learn what a parabola is so you can solve the problem. This is an important concept.

http://en.wikipedia.org/wiki/Conic_section

http://www.mathwarehouse.com/geometry/parabola/standard-and-vertex-form.php

http://en.wikipedia.org/wiki/Parabola

http://www.analyzemath.com/parabola/Equation.html