We also graphed the function 'y = [square root] x', which looks like half a sideways parabola.
Next, we learned about 'young Gauss', who was a pretty clever seven-year-old. His teacher told the class one day to add up all the numbers from 1 to 100. Instead of writing it all out and adding it, he found a pattern.
Using the same idea as above, we found the formula for an arithmetic series.
Sn = (n/2)[2a+(n-1)d]
A series is the sum of numbers in a sequence to a particular term in a sequence (definition can be found on blog). You can't have a series if you don't have a sequence first, or else, what are you adding?
We also found the formula for a geometric series.
Sn = [a(1-r^n)]/(1-r)
Lastly, we touched a little bit on 'Sigma', which is located on the second-last slide (8).
Mmm, yeah, that's it. I'm tired now, I'm sorry. Hahaha, next scribe is Joseph, since he asked.. again.