Symbolic Index /sym/ea4bfa
id=1 · host=au.commstar.world · 2026-10-20 22:28Z
F = G m₁m₂ / r²
\binom{n}{k} = \frac{n!}{k!(n-k)!}
244K
AgNO₃ + NaCl → AgCl↓ + NaNO₃
52K
\binom{n}{k} = \frac{n!}{k!(n-k)!}
det| 10 5 ; 4 11 | = 90
90K
\binom{n}{k} = \frac{n!}{k!(n-k)!}
91K
2H₂ + O₂ → 2H₂O
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
100K
det| 8 4 ; 0 9 | = 72
∑_{k=1}^{n} k = n(n+1)/2
197K
det| 3 1 ; 4 4 | = 8
∑_{k=1}^{n} k = n(n+1)/2
218K