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daiando/enumerable_reduce_sample01.rb

Created December 7, 2015 01:13
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Consider and arithmetico-geometric sequence where the nth term of the sequence is denoted by t(n)=n**2+1,n>0. In this challenge, your task is to complete the sum method which takes an integer n and returns the sum to the n terms of the series.
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enumerable_reduce_sample01.rb
def sum_terms(n)
(1..n).reduce(0){|sum, i| sum + i**2 + 1}
end
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