Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Intercept question (manipulating equations)

  1. Jan 26, 2006 #1
    I saw this question yesterday.

    Find the x and y intercepts of:

    1/x = 1/y
    --------

    In this case are the intercepts undefined? Or can I cross multiply and get x = y, and then the intercepts are 0 and 0? Also, if I cannot cross multiply, or maniuplate the equation, does that mean that anytime you are not allowed to have x = 0, or y = 0 as values in the original equation, then the respective intercept is undefined?

    Thanks!
     
  2. jcsd
  3. Jan 26, 2006 #2

    StatusX

    User Avatar
    Homework Helper

    The curve defined by that equation is the line y=x minus the point at the origin, so it has no intercepts. The equality simply doesn't hold (since the equation isn't well defined) at x=y=0.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Intercept question (manipulating equations)
  1. X intercepts (Replies: 4)

Loading...