Symbolic Index /sym/ea4bfa
id=1 · host=au.commstar.world · 2026-10-20 20:25Z
∑_{k=1}^{n} k = n(n+1)/2
∑_{k=1}^{n} k = n(n+1)/2
244K
6ω² + 3ω + 2 = 0
det| 7 4 ; 4 8 | = 40
90K
CH₄ + 2O₂ → CO₂ + 2H₂O
Fe₂O₃ + 3CO → 2Fe + 3CO₂
137K
∑_{k=1}^{n} k = n(n+1)/2
197K