Series rewrite question

1. Dec 11, 2011

Teachme

Picture of problem included. Just wondering how to get from the first step to the second step?
Thanks!

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2. Dec 11, 2011

LCKurtz

Factor a 4 out of the numerator.

3. Dec 11, 2011

Teachme

That leaves me with 4 (1^n/3^n-1) though doesn't it?

4. Dec 11, 2011

LCKurtz

No. What is $4^1\cdot 4^{n-1}$?

5. Dec 11, 2011

Teachme

Oh I see now. Thanks!