Question

Which answer represents a geometric sequence?

A. {1,3,9,27,…}
B. {17,10,3,−4,…}
C. {0,2,4,8,…}
D. {5,10,15,20,…}

Answer 1

A.

Explanation:

in A. your q is 3 so: a1=1 a2= a1*q=3 a3=a2*q=9 and so on.

i C. its almost the right answer too,but notice that a1 is 0. so 0*2 is still 0 so though it looks almost perfect the first number ruins it