Field Notes / Σ /sym/b26508
id=1 · host=uk.mattivster.me · 2026-10-21 07:04Z
∑_{k=1}^{n} k = n(n+1)/2
∑_{k=1}^{n} k = n(n+1)/2
148K
3y² + 9y + 5 = 0
∑_{k=1}^{n} k = n(n+1)/2
7K
CaCO₃ → CaO + CO₂
det| 6 2 ; 7 7 | = 28
det| 9 9 ; 5 10 | = 45
468K
det| 7 4 ; 4 8 | = 40
57K
det| 7 9 ; 2 8 | = 38
\oint_C \vec{F}\cdot d\vec{r} = 0
det| 8 8 ; 4 9 | = 40