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OpenStudy (anonymous):
Whats the sum of the first 30 terms of the sequence below. a^n=4n+1
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OpenStudy (anonymous):
\[\sum_{n = 0}^{29}(4n + 1) = 30 + 4\sum_{n-1}^{29}n\]= 30 + 4(29)(30)/2 = 1770.
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