Question

if the first two terms of geometric sequence are 4 and 2, which of the following would be the 10th

Answer 1

and no its not multiple choose

Answer 2

@darkknight

Answer 3

the geometric seq is:

a, a*r, a*r^2, a*r^3,.....

if a_1 = 4 an a_2 = a_1 * r = 4

then r = ??

and the 10th is a * r^(10-1), right?