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Virty [35]
3 years ago
11

What is the sum of the first 30 terms in a(n)=4n+1

Mathematics
1 answer:
dimulka [17.4K]3 years ago
6 0
Hello,

\sum _{i=1} ^{30}(a_i)=\sum _{i=1} ^{30}(4*i+1)\\

=4*\sum _{i=1} ^{30}(i) +\sum _{i=1} ^{30}(1)\\

=4* \dfrac{31*30}{2} + 30 =1860+30=1890
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