Given the Arithmetic series A1+A2+A3+A4 8 + 14 + 20 + 26 + . . . + 140 What is the value of sum?

Answer 1

Let S = ∑_n=1²³ 6n +2 = 2*23 +6*(∑_n=1²³n)

(∑_n=1²³n)= (n(N=1)/1 = (23*24)/2 = 12*23 = 276.

so S = 2*23 +6*276 = 1702

Hope this helps

Lenny

Answer 2

If you are asking for the sum of the first four terms:

8 + 14 + 20 + 26 = ?