3 ms·
I'd like to understand how you came up with the equation summing up to 235
by kpskps 8y ago
I'd like to understand how you came up with the equation summing up to 235
- edanm 8y agoIf you take the 52 out of the sum, it becomes: 52 * (1/1 + 1/2 + 1/3... +1/n), where n=52. This is the harmonic series. I didn't know off-hand of a formula for the sum of the harmonic series, so I searched, and apparently, there is no closed form formula for this. So you either have to actually calculate this number, or find an approximation. Personally, I just plugged it into Wolfram alpha: http://www.wolframalpha.com/input/?i=1%2F1+%2B+1%2F2+%2B+...+%2B+1%2F52 http://www.wolframalpha.com/input/?i=1%2F1+%2B+1%2F2+%2B+....... The result is, approximately, 4.538. And indeed, 4.538 * 52 = 235.976, which rounds down to 235 (not sure why the author rounded down). Thanks for asking this!