Jackson
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1,038
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 9 Prove that $4^{2n} + 10n -1$ is a multiple of 25 8 If $z$ is the unique element such that $uzu=u$, why is $z=u^{-1}$? 8 Why does L'Hospital's rule work? 6 Finding the value of $\sqrt{1+2\sqrt{2+3\sqrt{3+4\sqrt{4+5\sqrt{5+\dots}}}}}$ 6 Evaluating $\int\sin^3t \, dt$

### Reputation (1,038)

 +5 Limit of Restricted Sum of Multinomial +5 $\mathbb{R}^{N}/\Sigma_{n}$ as a topological space +10 Does there exist rational $a,b,c$, such that $\sqrt[3]{1}+\sqrt[3]{2}+\sqrt[3]{4}=\sqrt[3]{a}+\sqrt[3]{b}+\sqrt[3]{c}$ +5 What topological space do I obtain by gluing these edges?

### Questions (17)

 7 Dirichlet Series for $\#\mathrm{groups}(n)$ 4 Branch Cut Issues 3 What topological space do I obtain by gluing these edges? 3 Condition on semiring to ensure that $f: k \rightarrow k+k$ is injective 3 How to Prove ($\mathbb{C}\langle x, y \rangle$, $\|\cdot\|$) is a Banach Space

### Tags (49)

 15 calculus × 3 6 abstract-algebra × 9 13 number-theory × 4 6 problem-solving 11 induction × 3 5 algebra-precalculus × 2 8 integration × 2 4 asymptotics 7 trigonometry × 2 4 elliptic-curves

### Accounts (14)

 Mathematics 1,038 rep 413 Mathematica 340 rep 28 Stack Overflow 209 rep 416 MathOverflow 148 rep 5 Ask Ubuntu 145 rep 16