Field Notes / Σ /sym/b26508
id=1 · host=uk.mattivster.me · 2026-10-18 21:38Z
AgNO₃ + NaCl → AgCl↓ + NaNO₃
det| 2 7 ; 7 3 | = -43
144K
det| 4 7 ; 0 5 | = 20
∑_{k=1}^{n} k = n(n+1)/2
90K
∑_{k=1}^{n} k = n(n+1)/2
det| 7 4 ; 4 8 | = 40
29K
\binom{n}{k} = \frac{n!}{k!(n-k)!}
det| 12 4 ; 3 13 | = 144