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March 1, 2015

Posted by **Ally** on Tuesday, December 18, 2012 at 7:33pm.

- Math -
**Reiny**, Tuesday, December 18, 2012 at 8:18pmt(4) = ar^3 = -4

t(8) = ar^7 = -324

divide t(8) by t(4)

r^4 = 81

r = 81^(1/4) = ± 3

if r = +3

in t(4)

a(3^3) = -4

a = -4/27

t(10) = (-4/27)(3^9) = -2916

if r = -3

a = -4/-27 = 4/27

t(10) = ar^9 = (4/27)(-3)^9 = 4(-729) = -2916

either way, t(10) = -2916

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