Question

Find the sum of the arithmetic series 8 +13 +...+ 58.

a) 726
Ob) 1914
Oc) 330
d) 363

Answer 1

363 (d)

Explanation:

Sum = (a1+an)(n)/2

n = (an-a1)/d +1 = 11

Plug into the sum formula.

Sum = 363