Doyou remember studying the arithmetic sum and geometric sum in school? What about their proofs and formulas? When does a geometric sum converge? Don’t worry because this question will be a good refresher and challenge for you
Here’s a hint: no prime factors other than 2, 3 or 5 mean factors can include combination of 2, 3 and 5 …
I recommend you pause the article, grab your pen and paper, and give this a go. When you are ready, keep reading for the solution!