SOLUTION: a1= 2
r= 3
Formula is Sn = {{{a1*(r^n - 1)/(r - 1)}}}
Here n =6, so S6 = {{{2*(3^6 - 1)/(3 - 1)}}} = 728

Algebra ->
Sequences-and-series
-> SOLUTION: a1= 2
r= 3
Formula is Sn = {{{a1*(r^n - 1)/(r - 1)}}}
Here n =6, so S6 = {{{2*(3^6 - 1)/(3 - 1)}}} = 728
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