Posted by **CL** on Monday, March 1, 2010 at 7:26pm.

Given the expression Sn = n^2 + 2n for the sume of the first n terms of a series, determine

a) An expression, in simplified form, for Sn-1 in tmers of n

b) an expression, in simplified form, for the nth terms, tn in terms of n

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