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September 20, 2014

September 20, 2014

Posted by **Awe** on Tuesday, January 21, 2014 at 3:16pm.

- maths -
**Damon**, Tuesday, January 21, 2014 at 3:38pma r^0 + a r^1 + a r^2 +.... ar^(n-1)

the 18th term is ar^17

if a = 2 and r = -2

then a r^17 = 2 (-2)^17

= - 2^17 = -131072

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