Summation Notation (Sigma)

I introduce the Summation Notation...Sigma...and work through five examples related to the topic of sequences. I should be using the correct vocabulary of Sigma in this lesson instead "Greek E" For all my lessons on Sequences and Series go here:) http://www.profrobbob.com/pre-calculus/intro-to-sequences-arithmetic-geometric Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob