Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-20 03:39Z
∇ × E = −∂B/∂t
Fe₂O₃ + 3CO → 2Fe + 3CO₂
168K
det| 4 7 ; 2 5 | = 6
446K
\binom{n}{k} = \frac{n!}{k!(n-k)!}
det| 3 6 ; 0 4 | = 12
144K
∑_{k=1}^{n} k = n(n+1)/2
371K
∂x/∂n = 6x
∑_{k=1}^{n} k = n(n+1)/2
86K
\lim_{x\to 0} \frac{\sin x}{x} = 1
det| 7 4 ; 4 8 | = 40
234K
\binom{n}{k} = \frac{n!}{k!(n-k)!}