1. The problem statement, all variables and given/known data Hi everyone, this is probably an easy question but I'm having trouble on the wording of the proof. Let f be continuous at x=c and f(c) > 1 Show that there exists an r > 0 such that [tex]\forall x \in B(c,r) \bigcap D : f(x) > 1[/tex] 2. Relevant equations [tex]\forall \epsilon > 0, \exists r > 0, \forall x \in B(c,r) \bigcap D \Rightarrow |f(x) - f(c)| < \epsilon [/tex] f(c) > 1 3. The attempt at a solution I'd put something here but I don't really have any attempts. I originally thought of using the limit rule that lim f(x) = f(c) but that doesn't work since c could be an isolated point. If I used a graph it just seems so obvious, but I have to use words to prove it. I tried also to use a contradiction, but using just what I put down in (2) didn't lead to any direct contradiction that I could see. A nudge in the right direction would be helpful.