Find the sum of the series: 3 + 5 + 7 + 6 + 9 + 12 + 9 + 13 + 17 + … to 3n terms
given an AP is whose first term is 3 and d is 2
So, the sum is given by formula
To find: sum of the given AP
Substituting the values in the formula
s = 3n(3n + 2)