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Difference between revisions of "User:Fingolfin/Sandbox"
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<math>\sqrt{2}+\pi^{20+a_i} - \tfrac{23}{42}</math> | <math>\sqrt{2}+\pi^{20+a_i} - \tfrac{23}{42}</math> | ||
<math>\sum_{k=1}^n k = \frac{k(k+1)}{2}</math> | |||
<math> | |||
\operatorname{erfc}(x) = | |||
\frac{2}{\sqrt{\pi}} \int_x^{\infty} e^{-t^2}\,dt = | |||
\frac{e^{-x^2}}{x\sqrt{\pi}}\sum_{n=0}^\infty (-1)^n \frac{(2n)!}{n!(2x)^{2n}} | |||
</math> | |||