Question

?

Answer 1

set up two expressions, one for each term

an = a1*r^(n-1)

12 = a1*r^(2-1)
4/3 = a1*r^(4-1)

divide expression 1/expression 2 to eliminate a1 and solve for r

Answer 2

1/r^2=9

Answer 3

good so r = ?

Answer 4

1/3

Answer 5

good, so 1/3 = your ans