Symbolic Index /sym/ea4bfa
id=1 · host=au.commstar.world · 2026-10-20 14:42Z
∑_{k=1}^{n} k = n(n+1)/2
∑_{k=1}^{n} k = n(n+1)/2
52K
det| 12 5 ; 4 13 | = 136
AgNO₃ + NaCl → AgCl↓ + NaNO₃
90K
\frac{11}{6} \sum_{i=1}^{n} i^{2}
91K
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
\lim_{t\to 0} \frac{\sin t}{t} = 1
50K
det| 4 9 ; 7 5 | = -43
∑_{k=1}^{n} k = n(n+1)/2
137K
det| 1 1 ; 3 2 | = -1
\frac{8}{6} \sum_{i=1}^{n} i^{2}
262K
det| 9 4 ; 1 10 | = 86
196K
det| 12 9 ; 3 13 | = 129
\binom{n}{k} = \frac{n!}{k!(n-k)!}
218K
det| 3 8 ; 6 4 | = -36