17
∑ 3+7k
k=0
S18 = 18/2 (2*3+17*7)
Dante is making a necklace with 18 rows of tiny beads in which the number of beads per row is given by the series 3 + 10 + 17 + 24 + ...
a. Use summation notation to write the series, give
i.the lower limit of the sum
ii.the upper limit of the sum
iii.the explicit formula of the sum
Please help? Thanks
1 answer
1 answer