Proving an equation involving 4 real numbers

  • Thread starter Jadehaan
  • Start date
  • #1
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Homework Statement



This is the question followed my my attempt at the solution:


attachment.php?attachmentid=24154&stc=1&d=1267834532.png




Just wondering if this looks right?
Thanks for any and all feedback,
Jim
 

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Answers and Replies

  • #2
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I'll let someone else check the proof, but I thought you might like to know that "...as desired. QED" is redundant. QED is an abbreviation for "quod erat demonstrandum", meaning "which was to be demonstrated".

The (hollow or solid) square symbol is more common nowadays, which I've heard is a pun on quod/quad, but I don't know if that's true.
 

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