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
    17,737
    4,789
    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
    17,737
    4,789
    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
     
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