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January 30, 2015

January 30, 2015

Posted by **dennis** on Friday, December 31, 2010 at 5:52am.

- f/math -
**drwls**, Friday, December 31, 2010 at 7:46amIs g.p. supposed to mean geometric progression? You should not assume that we know that.

The fifth term will be 2^3 = 8 times the second term

a5 = 8 a2

a5 = a2 + 45

0 = 7 a2 -45

a2 = 45/7

a3 = 90/7

a4 = 180/7

a5 = 360/7

Check: a5 - a2 = 315/7 = 45

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