2 + 2^2 + 2^3 + ... + 2^8 = ?
Select the correct option:
A) 510 B) 610 C) 710 D) 810 E) 910
Given series is a G.P. with a = 2, r = 2 and n = 8.   Therefore, sum = a(r^n-1)/(r-1) = 2 x (2^8 –1)/(2-1) = (2 x 255) =510   510nswer is 510.
<result>A</result>
2 + 2^2 + 2^3 + ... + 2^8 = ?