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Prove left half plane is open

  1. Oct 12, 2010 #1
    Please see question 4 on the PDF document below to see the question & my attempt at a solution. I'm getting really muddled up with the minus signs at the moment, and what is, and what is not negative. Could you please help me to move forward, I believe I'm going in the right direction... I'm trying to show that x<0 therefore is inside the left half plane...

    Thanks!

    EDIT: I know x_0 is negative as that's how i've defined it, however x is unknown. The inequalities at the end must go wrong somehow I think?
     

    Attached Files:

    Last edited: Oct 12, 2010
  2. jcsd
  3. Oct 12, 2010 #2
    Image link...

    http://img149.imageshack.us/img149/1692/problembj.jpg [Broken]
     
    Last edited by a moderator: May 5, 2017
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