I'm working on a problem as part of exam revision, but I've run into a bit of trouble so far. The problem is;
Give an (ε,δ) proof that f(x) = 1/\sqrt{10 - x^2} is continuous at x = -1
The attempt at a solution
So far what I've gotten is f(x) - f(-1) = 1/(\sqrt{10 - x^2}) - 1/3
= (3 -...