The sum of the given series [tex]\sum 4i[/tex] is 60.
A series can have a sum of each term of the series tends to zero but there are some series in which has each term tends to be zero and do not have a sum.
5
[tex]\sum 4i[/tex] = 4 × 1 + 4 × 2 + 4 × 3 + 4× 4 + 4 × 5
i=1 = 4 + 8 + 12 + 16 + 20
= 60
Hence, the sum of the series [tex]\sum 4i[/tex] is 60.
Learn more about the series;
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