1. The problem statement, all variables and given/known data 1. ty'+2y = 4t^2 , y(1) = 2 2. Relevant equations 3. The attempt at a solution 1. I know how to get the answer but i have a trivial question. The answer is y=t^2 + t^(-2) and t>0. I do not get why t>0. Why can't t be R except 0?