Since the midterm was coming up, or rather has already passed, I decided to focus on what I had somewhat forgotten, which is what we first learned; geometric and arithmetic sequences. Since we learned the until months ago, I had forgotten some key information when having to solve for a series or sequence. I mostly forgot the naming and letters in the formulae. Being that Physics 11 has so many abbreviations, I got caught up in all of the ones I had already known. It was also good to review this chapter because when we don’t practice something constantly, we will eventually forget it.
Here is a link to help understand: http://discretetext.oscarlevin.com/dmoi/sec_seq-arithgeom.html
I studied thoroughly on infinite series and the rules and restrictions that come with it. The sum of an infinite arithmetic sequence is a negative infinite number if d is less than 1, and a positive infinite if d is bigger than 1. There are two ways to find the sum of a finite arithmetic sequence. To use the first method, you must know the value of the first term (a1), the rate at which it multiplies (r) and the value of the last term (an). Then all you have to do is punch in the numbers into the equation. S∞ = a1 / (1-r ).
See this link to learn more : http://home.windstream.net/okrebs/page133.html