A third at a time

Find the sum of the infinite series $1 + \frac{1}{3} + \frac{1}{9} + \frac{1}{27} + \dots$

~8 minWritten answer · compare with the solutionGeometric series

Stuck? A gentle nudge

Something off?

Workspace

Your working

Check your full solution

Upload photos of your handwritten work or a PDF, and Lemma will read it and tell you whether it's right — and where it first goes wrong if not.