Write Both Series As A Summation In Sigma Notation

a). 3+2+5/3+3/2

b). 5+8+11+14+17+20

PLEASE HELP ME AND THANK YOU IF YOU DO!!!!

Solution

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Sorry, I do not see the pattern in example a).

b however is the sum of an arithmetic series

∑[5+3(n-1)] for n=1 to 6