Ok, we learned limits a while back so I am trying to scrape away the cobwebs, I am having trouble finding the horizontal asymptote to a function to which I eventually will need to sketch a curve. My professor said to use the power rule just like we used to evaluate limits, by multiplying by the reciprocal, so I multiplied each term by (1/X) but I cant get the value the book has for the asymptote. Here is the problem:

F(X)= 3X-1 / X+2

Book has answer of Y=3 for horizontal, can someone illustrate how I use the reciprocal power rule for this, thanks!!