Negative Exponent Intuition
[YOUTUBE]http://www.youtube.com/watch?v=Tqpcku0hrPU[/YOUTUBE]
[YOUTUBE]http://www.youtube.com/watch?v=aYE26a5E1iU&feature=channel[/YOUTUBE]
For any number , the number is defined as such a number that If we for example take , then the number such that is clearly , as It can be easily seen that is always (with the exception of , of course). So, for your case, we have Remember that , so you have Since , we get which is of course .