Symbolic Index /sym/ea4bfa
id=1 · host=au.commstar.world · 2026-10-20 14:18Z
∑_{k=1}^{n} k = n(n+1)/2
∑_{k=1}^{n} k = n(n+1)/2
244K
det| 7 4 ; 4 8 | = 40
52K
det| 12 5 ; 4 13 | = 136
det| 11 5 ; 0 12 | = 132
90K
det| 11 9 ; 5 12 | = 87
91K
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
Fe₂O₃ + 3CO → 2Fe + 3CO₂
50K
det| 4 9 ; 7 5 | = -43
det| 4 2 ; 3 5 | = 14
137K
det| 1 1 ; 3 2 | = -1
det| 2 7 ; 7 3 | = -43
det| 12 9 ; 3 13 | = 129
det| 3 8 ; 6 4 | = -36