Symbolic Index /sym/ea4bfa
id=1 · host=au.commstar.world · 2026-10-20 20:23Z
∑_{k=1}^{n} k = n(n+1)/2
∑_{k=1}^{n} k = n(n+1)/2
52K
6ω² + 3ω + 2 = 0
det| 4 2 ; 3 5 | = 14
90K
det| 9 4 ; 1 10 | = 86
91K
CH₄ + 2O₂ → CO₂ + 2H₂O
det| 8 3 ; 4 9 | = 60
∑_{k=1}^{n} k = n(n+1)/2
137K
9x² + 3x + 6 = 0