Mathematics
Donald Splutterwit's user avatar
Donald Splutterwit's user avatar
Donald Splutterwit's user avatar
Donald Splutterwit
  • Member for 6 years, 4 months
  • Last seen more than a month ago
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82
Can we calculate $ i\sqrt { i\sqrt { i\sqrt { \cdots } } }$?
55
Prove that every positive integer divides a number such as $70, 700, 7770, 77000$.
36
Why do these paths all have the same length?
31
Is there a closed-form solution for $\sum_{n=1}^{\infty} \sum_{m=1}^{\infty} \frac{1}{nm(3n+m)}$?
21
If $u_1=1$ and $u_{n+1} = n+\sum_{k=1}^n u_k^2$, then $u_n$ is never a square.

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