1. The problem statement, all variables and given/known data limi as x-> positive infinity x+r((x^2)+2x) 3. The attempt at a solution multiply by conjugate x-r((x^2)+2x) I get (x^2)-(x^2)+2x/x-r((x^2)+2x) Which becomes 2x/x-r((x^2)+2x) Which I end up with 2/1-r(1-(2/x)) But I go wrong somewhere because I end up with 2/0 and the answer is positive infinity. I keep getting undefined and I can't see where I'm going wrong. Could someone point it out?