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## Homework Statement

equation: http://img292.imageshack.us/img292/6239/untitledkl6.jpg [Broken]

## Homework Equations

can use geometric series i think.

## The Attempt at a Solution

I think this is a geometric series, i plugged numbers into the equation, starting from 1 and got: 1/16 + 64/7 + 256/49 +...

maybe i can use a formula something like this? --> 1/(1-a)

need help with this please.

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