For these models there are methods such as the perturbation method which can<span> be used to find an approximate analytical solution within a certain range. The </span>advantage<span> here over a </span>numerical<span> solution is that </span>you<span> end up with an equation (</span><span>instead of just a long list of numbers) which </span>you can<span> gain some insight from.</span>
Keep Change Flip!!! Keep: the first fraction 5 or 5/1 Change: Division sign to multiplication sign Flip (reciprocal): the second fraction So you get 5/1*9/2= 45/2 which simplified to 22 1/2
