- #1
silvermane
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Homework Statement
Let A = {x: x^2 + 3x + 2 <0}. Prove that this set is non-empty and bounded above. What is the least upper bound? Is it bounded below?
The Attempt at a Solution
Well, solving for the zeros and understanding that between the zeros, we satisfy our values of x's, I have that the set is (-2,-1) which has both an upper bound and lower bound. The least upper bound would be -1 as well.
I understand what's it's asking, but I'm having trouble writing a proof and would like it if I could perhaps have proof-writing tips.
Thank you so much for your help and tips in advance! :)