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OpenStudy (anonymous):
how do you find the sum of the first 30 terms of the sequence below? an=3n+2
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OpenStudy (zzr0ck3r):
so \[\sum_{i=1}^{30}3n+1=3\sum_{i=1}^{30}n+\sum_{i=1}^{30}1=3\frac{30(31)}{2}+30=1425\]
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