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January 31, 2015

January 31, 2015

Posted by **ciara** on Tuesday, February 12, 2013 at 3:39pm.

possible answers;

1/729

1/243

1/81

1/810

- algebra -
**Steve**, Tuesday, February 12, 2013 at 3:58pma = 81

r = 1/3

so,

T10 = ar^9 = 81/3^9 = 3^4/3^9 = 1/3^5 = 1/243

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