Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-20 00:01Z
∑_{k=1}^{n} k = n(n+1)/2
∑_{k=1}^{n} k = n(n+1)/2
168K
3x² + 3x + 6 = 0
det| 7 4 ; 4 8 | = 40
144K
∇²t = 0
det| 3 6 ; 0 4 | = 12
259K
Fe₂O₃ + 3CO → 2Fe + 3CO₂
86K
∑_{k=1}^{n} k = n(n+1)/2
224K
∑_{k=1}^{n} k = n(n+1)/2
234K