center

Let’s walk the bridge backwards

Closed Form

The infinite geometric series will equal on . How many terms of the series to we need for a good approximation on just ?

On the other hand, we could have factored out in order to get the index back to .

Then the closed form would be

Same formula.

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more examples can be found by following this link
More Examples of Geometric Series

2025-01-12 23:34:11