23 What does the math notation $\sum$ mean? 14 How do I find the base when Log is given 11 Mastering Math - Grade school- to College-level? 11 Algebraic Proof that $\sum\limits_{i=0}^n \binom{n}{i}=2^n$ 9 Really easy algebra problem

Reputation (3,076)

 +10 Is there no solution to the blue-eyed islander puzzle? +5 Intuitive reasoning behind $\pi$'s appearance in bouncing balls. +10 How do I find the base when Log is given +5 Proof of subfactorial formula $!n = n!- \sum_{i=1}^{n} {{n} \choose {i}} \quad!(n-i)$

Questions (52)

 43 Intuitive reasoning behind $\pi$'s appearance in bouncing balls. 37 Non-Scientific questions solved by mathematics 34 Is there no solution to the blue-eyed islander puzzle? 20 Geometric proof for inequality 13 Combined AM GM QM inequality

Tags (84)

 55 algebra-precalculus × 8 17 trigonometry × 7 26 sequences-and-series × 5 16 combinatorics × 10 23 notation 15 learning × 2 21 logarithms × 3 13 geometry × 13 20 calculus × 7 12 summation × 2

Accounts (23)

 Mathematics 3,076 rep 12153 Skeptics 1,627 rep 1840 The Workplace 759 rep 3711 Chemistry 276 rep 13 Area 51 176 rep 4