SOLUTION: k=n If ∑ = n(5+3n)/2, find an expression for a_n (a subscript n) k=1

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Question 1047524: k=n
If ∑ = n(5+3n)/2, find an expression for a_n (a subscript n)
k=1
Answer by ikleyn(52786) About Me  (Show Source):
You can put this solution on YOUR website!
.
a%5Bn%5D = S%5Bn%5D - S%5Bn-1%5D = %28n%2A%285%2B3n%29%29%2F2 - %28%28n-1%29%2A%285%2B3%28n-1%29%29%29%2F2.

Please simplify it on your own.