Zhuli

 17 Why should it be $\sqrt[3]{6+x}=x$? 12 Are there at least two people present who shook hands with exactly the same number of people? 11 Why does $(a+b)^2= a^2+b^2 + 2ab$? Why is the $2ab$ there? 9 How to find the 3 fastest horses? 8 Without calculating the square roots, determine which of the numbers:$a=\sqrt{7}+\sqrt{10}\;\;,\;\; b=\sqrt{3}+\sqrt{19}$ is greater.

Reputation (2,361)

 -2 Without calculating the square roots, determine which of the numbers:$a=\sqrt{7}+\sqrt{10}\;\;,\;\; b=\sqrt{3}+\sqrt{19}$ is greater. +10 Why should it be $\sqrt[3]{6+x}=x$? +10 What is the reason for saying that mathematics does not constitute science even if use experimental approach so often in mathematics? +15 Number of ways to arrange no matches?

Questions (3)

 9 Simple understanding of advanced math 1 Proof of $\sum_{k=0}^n{ \binom{2k}{k} 2^{2n-2k} } = (2n+1) \binom{2n}{n} = \frac{n+1}{2} \binom{2(n+1)}{n+1}$ [duplicate] 1 Powers of roots in terms of polynomial coefficients

Tags (67)

 48 combinatorics × 25 17 solution-verification 39 algebra-precalculus × 7 16 pigeonhole-principle × 3 27 radicals × 3 14 recreational-mathematics × 2 22 discrete-mathematics × 5 13 probability × 9 17 cubic-equations 9 geometry × 4

Bookmarks (62)

 1044 How long will it take Marie to saw another board into 3 pieces? 719 What's an intuitive way to think about the determinant? 592 Why is $1 - \frac{1}{1 - \frac{1}{1 - \ldots}}$ not real? 570 Examples of patterns that eventually fail 427 Proofs that every mathematician should know. [closed]

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