6. Summations #

Created Tue May 7, 2024 at 10:53 AM

Common math #

1. Σ 1(a to b) = b-a+1
2. AP: 1 + 2 + 3 + … + n = n * (n+1) / 2
3. GP: 1 + x + x² + x³ + … + x^n-1 = (xⁿ - 1)/(x-1)
4. HP: 1 + 1/2 + 1/3 + 1/4 + … + 1/n ~= log(n)
5. log1 + log2 + log3 + … + log(n) ~= nlog(n)
6. 1 + 2^p + 3^p + … + n^p ~= n^p+1/(p+1)
7.