1. The problem statement, all variables and given/known data Do you know what O(x) means? This O was put after a Taylor polynomial, and I don't get what it means. I've read the definition, and I don't really get it, what does it actually tell me? For example, what does writing exp(x) = 1 + x + x^2/4 + O(x^3) , where Rn(x) is O(x^3) (Rn(x) is the remainder) tell me?