Reaction Log /sym/649cc0
id=1 · host=co.gridbatch.net · 2026-10-17 23:56Z
∑_{k=1}^{n} k = n(n+1)/2
\frac{12}{6} \sum_{i=1}^{n} i^{2}
154K
\frac{6}{7} \sum_{i=1}^{n} i^{2}
AgNO₃ + NaCl → AgCl↓ + NaNO₃
230K
∑_{k=1}^{n} k = n(n+1)/2
\binom{n}{k} = \frac{n!}{k!(n-k)!}
119K
det| 5 9 ; 7 6 | = -33
152K
det| 7 4 ; 4 8 | = 40
173K
det| 3 6 ; 0 4 | = 12
329K
\binom{n}{k} = \frac{n!}{k!(n-k)!}
368K