Question

In the arithmetic series,  which is the sum of the first 22 terms if the first term is 12 and the common difference is 3?

627
792
957
990

Answer 1

957

Explanation:

In an arithmetic series we can derive the sum of a arithmetic series by using the formula n/2(2a+d(n-1)) From this and we know the d=3 and we have 22 terms and thef irst is 12 we can get 11(24+3(21))= 11*(87)=957. This means the sum is 957