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Mathematics
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An Alien
  • Member for 2 years, 9 months
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10
Solving $X + \frac{X}{1+2} + \frac{X}{1+2+3} + \frac{X}{1+2+3+4} +\dots+ \frac{X}{1+2+3+\dots+2017} = 2017$
6
Finding $\Bbb{R}\to \Bbb{R}$ functions satisfying $f(x + y) = f(x) + f(y)$ and $f(xy) = f(x) f(y)$