Posted by Brock on Tuesday, July 10, 2012 at 7:47pm.
you know the "formula" has to be 3n -1 to make it start at 2 when n=1
what must be n when 3n-1 = 29?
3n = 30
n = 10
so , (don't know how to make summation sign)
summation of 3n-1, n=1 at the bottom, 10 at the top of the sign.
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