I have a book series of time and says in part:

An example of time series would be:

Then they say, this series can also be expressed as:

How do they do and why they develop the series?

Thank you very much.

Greetings.

Dogod

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- September 17th 2010, 07:30 PMDogod11Time series
I have a book series of time and says in part:

An example of time series would be:

Then they say, this series can also be expressed as:

How do they do and why they develop the series?

Thank you very much.

Greetings.

Dogod - September 17th 2010, 08:02 PMSoroban
Hello, Dogod11!

I'm not familiar with Time Series.

I've had to come up with my own theories.

Quote:

An example of time series would be:

Then they say, this series can also be expressed as:

. .

How do they do it and why they develop the series?

It only makes sense if . . . the initial quantity is zero.

Then we have:

. .

And we see the pattern:

. .

which can be written: .

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

did they derive this formula?*Why*

So we can find, say, the 20th term

. .*without*cranking out the first 19 terms.

- September 18th 2010, 07:08 AMDogod11
Thank you very much