This is my first post on the forums, so I hope people can help me out. I'll be spending a lot of time here as I'm taking two difficult university math courses, Analysis I and Honours Linear Algebra.
Anyways, here is the question, part of a suggested exercise for the Analysis class. I converted it to the form of a<b<c but that didn't help me. I'm new to the proofs and need a lot of help. Any help will be appreciated.