I am currently stuck on a problem to find the oblique asymptote with long division. The equation is f(x) = 4x/ (x^2 - 4x-5) . Now I using long division you cannot get an answer because the degree of the divisor is greater than the degree of the dividend. Would that mean that there is just a remainder of 4x OR 4x/(x^2-4x-5). That would basically mean that the oblique asymptote of this equation is 4x, right?
Or am I going in the wrong direction? Thanks