Field Notes / Σ /sym/b26508
id=1 · host=uk.mattivster.me · 2026-10-20 20:49Z
∑_{k=1}^{n} k = n(n+1)/2
det| 9 4 ; 1 10 | = 86
164K
det| 7 1 ; 7 8 | = 49
232K
10x² + 3x + 7 = 0
det| 11 2 ; 5 12 | = 122
375K
\binom{n}{k} = \frac{n!}{k!(n-k)!}
47K
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
∑_{k=1}^{n} k = n(n+1)/2
165K
det| 5 4 ; 7 6 | = 2
2φ² + 1φ + 4 = 0
\frac{8}{7} \sum_{i=1}^{n} i^{2}
12r² + 1r + 6 = 0
7ψ² + 6ψ + 4 = 0
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
2H₂ + O₂ → 2H₂O