Symbolic Index /sym/ea4bfa
id=1 · host=au.commstar.world · 2026-10-20 14:14Z
∑_{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
∑_{k=1}^{n} k = n(n+1)/2
90K
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
det| 4 9 ; 7 5 | = -43
det| 8 5 ; 3 9 | = 57
137K
det| 9 7 ; 3 10 | = 69
197K
∑_{k=1}^{n} k = n(n+1)/2
196K