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Intro to Geometric Series part 3

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Uploaded by on Mar 13, 2009

This is all about how we can come up a with a formula to calculate the SUM of a geometric series. Clever stuff...

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  • WHERE IS THE NEXT VIDDDDDD

  • were is the next video

  • but why would you multiply it by r in the second place?

  • AWSOME!!!...... may i suggest u to get a White board..... and some erasable markers..... so u dont have to buy Pages all the time...... just write and erase...... the viewers can re watch the video if they miss something.........

  • is that "r" the pro-numeral that is written below the sigma??

  • saviour!

  • Welll.. with this info i was able to find the sum of un = (-1)^n . (3^n/pi^(n+1))...

    Thx a lot sir.. ;) .

    One bit closer to getting an A on that final exame of Analysis.

  • Thanks. You explain things so clearly.

  • when you are doing the sum, you did

    s=a+ar+ar^2+ar^3+.........+ar^­n-1 and multiplied by r, which gave u

    rs= ar+ar^2+ar^3+..........+ar^n but had you continued s to ar^n and multiplied it by r, you would have gotten ar^n+1

  • Brilliant, I wish you would cover more maths topics. It's so much easier to follow on here than in the lecture. :D

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