Summation Formulas and Sigma Notation (Part 4) Examples

This is video 4 in series on summations. In this video we combine the 3 formulas and 2 properties of sums we learned in the last videos to solve more complex sums.

Summation Playlist:

[wolframalpha]

Woah! After a break of five years !! Nice to see you again in action!

[miladr]

helped me a lot !! keep up the great work!!

[ugkqcqs]

isnt the denominator for formula 3 meant to be 6?

[jelatine]

I'm actually going to take a shot and PRAY that you see this, even if the video is posted 1 year ago. I get the whole concept of sigma notation when the lower limit is 1, but what happens when the lower limit is greater than 1? I'm really hoping you can help me.