1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Ellipse help

  1. Dec 6, 2008 #1
    1. The problem statement, all variables and given/known data


    2. Relevant equations


    3. The attempt at a solution

  2. jcsd
  3. Dec 6, 2008 #2
    Re: E-l-l-i-p-s-e h-e-l-p!

    Remember the response I posted earlier:

    1. Plug the points (x, y) into each equation properly.
    2. You got rid of the 1 and didn't use it.
    3. You'll need to solve a system of 2 equations to find a, b.
  4. Dec 7, 2008 #3
    Re: E-l-l-i-p-s-e h-e-l-p!

    Thank you :smile:

    Is this correct? ans1.jpg
  5. Dec 7, 2008 #4


    User Avatar
    Science Advisor

    Re: E-l-l-i-p-s-e h-e-l-p!

    Check it yourself! It clearly has center (0,0). Do [itex](3, \sqrt{7})[/itex] and [itex]-\sqrt{3},3)[/itex] satisfy that equation? That is, are
    [tex]\frac{3^2}{30}+ \frac{(\sqrt{7})^2}{10}= 1[/tex]
    [tex]\frac{(\sqrt{3})^2}{30}+ \frac{3^2}{10}= 1[/tex] ?

    And don't forget that you were told there were two possible answers. What is the other answer?
  6. Dec 7, 2008 #5
    I really don't have an idea... can you give me a hint please? I tried to equate both equation but still I got the same answer...:confused:
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Similar Threads for Ellipse help Date
Help with Ellipse Question Mar 8, 2012
Ellipse equation help problem Dec 7, 2008
Also help with conicsmainly ellipses? Oct 24, 2008
Ellipses homework help Jun 5, 2007
Help graphing the equation of an ellipse. Jul 8, 2006