Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-19 07:59Z
∑_{k=1}^{n} k = n(n+1)/2
\frac{12}{6} \sum_{i=1}^{n} i^{2}
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∑_{k=1}^{n} k = n(n+1)/2
468K
\frac{6}{1} \sum_{i=1}^{n} i^{2}
det| 2 3 ; 5 3 | = -9
289K
∂x/∂θ = 8x
AgNO₃ + NaCl → AgCl↓ + NaNO₃
177K
3φ² + 4φ + 2 = 0
\oint_C \vec{F}\cdot d\vec{r} = 0
358K
det| 7 4 ; 4 8 | = 40
399K
det| 1 4 ; 3 2 | = -10
316K
\lim_{r\to 0} \frac{\sin r}{r} = 1
11K