Answer:

27/2

Step-by-step explanation:

Infinite Geometric Series =

where a₁ = first term and r = common ratio.

NOTE: Remember that the ratio in an infinite geometric sequence must be 0 < r < 1 or else it cannot be solved.

We can find out easily that a₁ = 9. Then, to find r, we must divide the second term by the first term which is 3/9 = 1/3 so r = 1/3,

Plugging in the values, = = .

Hope this helps!

~~DeanGD20