If you are given two functions and asked which function goes faster. You divide on function by the other and you use lopitals rule. If your ratio gives you a constant it is said the two fuction grow at the same rate. I can't understand why 5x and 2x would be growing at the same rate. 5=2? Isn't rate 5 for 5x and 2 for 2x. how is it 5x and 2x growing at the same rate?