Symbolic Index /sym/ea4bfa
id=1 · host=au.commstar.world · 2026-10-20 14:40Z
∑_{k=1}^{n} k = n(n+1)/2
det| 2 7 ; 7 3 | = -43
244K
det| 12 5 ; 4 13 | = 136
det| 4 6 ; 4 5 | = -4
91K
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
det| 4 9 ; 7 5 | = -43
∑_{k=1}^{n} k = n(n+1)/2
262K