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January 25, 2015

January 25, 2015

Posted by **Poppy** on Sunday, December 18, 2011 at 7:30pm.

- math -
**Reiny**, Sunday, December 18, 2011 at 8:10pmar^64 = 8000

ar^68 = 500

divide the second by the first...

r^4 = 1/16

r = ± 1/2

so if term(65) = 8000, and r = ± 1/2

then term(64) = 8000/r = 8000/±1/2 = ± 16000

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