4 ms·

The first is an infinite series: 9/10 + 9/100 + 9/1000 + ... + 9/10^n + ... The second is not?!

• deleted 6y ago
  [deleted]
• oconnor663 6y ago
  I mean you could if you want to: 1/10 + -9/100 + -9/1000 + -9/10000 + ... But I just meant them as series, not necessarily as sums.
  • jonsen 6y ago
    Or 1 - 9/10 - 9/100 - ... or 1 - ( 9/10 + 9/100 + ... ) So it becomes circular: 0.00...1 = 1 - 0.999... (In math a series is a sum: https://en.m.wikipedia.org/wiki/Series_(mathematics) https://en.m.wikipedia.org/wiki/Series_(mathematics)
    • oconnor663 6y ago
      Woops, you're totally right, I think I should've said "sequence".