Question

Find the sum of the first 33 terms of the following series, to the nearest

integer.
2, 11, 20,...

Answer 1

Explanation:

Common difference , d, is 9

Sn = n/2 ( a1 + a33) a33 = a1 + 32d = 2 + 32(9) = 290

S33 = 33/2 ( 2+290) = 4818