No label defined (Q1176)
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| Language | Label | Description | Also known as |
|---|---|---|---|
| English | No label defined |
No description defined |
Statements
B.79
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q_739
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Failed to parse (Conversion error. Server ("https://wikimedia.org/api/rest_") reported: "Cannot get mml. Server problem."): {\displaystyle \left\vert {\frac {e^{-ixu}-1}{u}}\right\vert ^{2}={\frac {2-2\cos(xu)}{u^{2}}}={\frac {4\sin ^{2}({\frac {xu}{2}})}{u^{2}}}\leq {\frac {4({\frac {xu}{2}})^{2}}{u^{2}}}=x^{2}}
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