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Math Proofs help / Sets

  1. Sep 28, 2012 #1
    1. The problem statement, all variables and given/known data

    hopefully the writing is readable:

    All three if possible.

    2. Relevant equations


    3. The attempt at a solution

    To be completely honest, I missed that whole week of lectures due to personal problems and I've had no chance to talk to an instructor or a classmate for some notes before this is due. I'm perfectly fine with just tiny tips here and there.


    My lame attempt at solving the first.
    Last edited by a moderator: Sep 28, 2012
  2. jcsd
  3. Sep 28, 2012 #2
    what have I done?
  4. Sep 28, 2012 #3
    I was able to figure out the first two I believe. But at the moment I seem to be stuck on the 3rd. Would it be alright if I was to list all the options a and b have in order for ab=4 and then write that we can see they all work?

    This is for a Math 273 course.
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