Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-20 17:14Z
d/dθ [θ^5] = 5θ^4
∑_{k=1}^{n} k = n(n+1)/2
446K
\frac{2}{4} \sum_{i=1}^{n} i^{2}
∑_{k=1}^{n} k = n(n+1)/2
144K
d/dr [r^4] = 4r^3
det| 9 4 ; 1 10 | = 86
259K
7α² + 1α + 1 = 0
det| 12 3 ; 1 13 | = 153
\lim_{β\to 0} \frac{\sin β}{β} = 1
∂n/∂β = 5n
AgNO₃ + NaCl → AgCl↓ + NaNO₃