# Math Help - Math

1. ## Math

Re:

2. Hello, qbkr21!

I am trying to get . $\frac{1 + 2^n}{3^n}$ .into the form: . $ar^{n-1}$
It can't be done . . .

The sequence is: . $\frac{3}{3},\:\frac{5}{9},\:\frac{9}{27},\:\frac{1 7}{81},\:\frac{33}{243},\:\cdots$

There is no common ratio $r$ . . . It is not a geometric sequence.