1. The problem statement, all variables and given/known data Consider the function ƒ:-k,k→R, where ƒ(x) = 1/√(k2-x2), where k is a positive constant. (i) Sketch the graph of y = ƒ(x) (ii) What is the domain of the function? 2. Relevant equations ƒ(x) = 1/√(k2-x2) 3. The attempt at a solution I don't understand how I am supposed to solve this. Couldn't k equal anything? Why couldn't it be 1 or 2? This makes no sense. Help is appreciated. Thanks.