Reaction Log /sym/649cc0
id=1 · host=co.gridbatch.net · 2026-10-17 23:16Z
∑_{k=1}^{n} k = n(n+1)/2
\binom{n}{k} = \frac{n!}{k!(n-k)!}
154K
\frac{6}{7} \sum_{i=1}^{n} i^{2}
\frac{1}{7} \sum_{i=1}^{n} i^{2}
60K
∑_{k=1}^{n} k = n(n+1)/2
\binom{n}{k} = \frac{n!}{k!(n-k)!}
119K
det| 10 7 ; 3 11 | = 89
152K
11θ² + 3θ + 2 = 0
∑_{k=1}^{n} k = n(n+1)/2
255K
det| 9 4 ; 1 10 | = 86
173K
det| 7 7 ; 6 8 | = 14
7ψ² + 4ψ + 3 = 0
∑_{k=1}^{n} k = n(n+1)/2
180K
AgNO₃ + NaCl → AgCl↓ + NaNO₃