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Sequences and Series: Tackling the Financial Math Questions

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RuiAce:

--- Quote from: anotherworld2b on January 06, 2017, 06:50:04 pm ---Hi Jamon,
I had a quick question what exactly do you mean in this part of your guide?
I had another quick question about limiting sums so basically if it is outside  -1 < r < 1 sum to infinity does not exist?

--- End quote ---
That's for an AP. -1 < r < 1 is for a GP. Just check if you accidentally read/quoted the wrong section.

jamonwindeyer:

--- Quote from: anotherworld2b on January 06, 2017, 06:50:04 pm ---Hi Jamon,
I had a quick question what exactly do you mean in this part of your guide?
I had another quick question about limiting sums so basically if it is outside  -1 < r < 1 sum to infinity does not exist?

--- End quote ---

Hey! That first bit is another formula for finding the sum of an arithmetic series: The \(l\) represents the last term in the sum you are finding, everything else has the standard meaning!

Yep, so if \(r\) isn't inside the the range \(-1<r<1\), then the sum to infinity has no bound. That is, it will just tend to infinity - We can't write its value down because it will never stop growing :)

I made an amendment to the guide above, it was a little ambiguous ;D

katnisschung:
Jamon u legend!! these questions always tripped me up

jamonwindeyer:

--- Quote from: katnisschung on January 19, 2017, 03:29:01 pm ---Jamon u legend!! these questions always tripped me up

--- End quote ---

I'm glad it was helpful! I know, they are awful aren't they :/

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