Math Dump /sym/d72502
id=333653 · host=jp.commstar.world · 2026-09-01 21:06Z
∑_{k=1}^{n} k = n(n+1)/2
det| 4 1 ; 6 5 | = 14
402K
det| 5 5 ; 6 6 | = 0
det| 5 3 ; 7 6 | = 9
398K
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
Fe₂O₃ + 3CO → 2Fe + 3CO₂
10n² + 1n + 2 = 0
\lim_{r\to 0} \frac{\sin r}{r} = 1
\binom{n}{k} = \frac{n!}{k!(n-k)!}
\binom{n}{k} = \frac{n!}{k!(n-k)!}
det| 10 8 ; 2 11 | = 94
4x² + 3x + 3 = 0
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
d/dx [x^10] = 10x^9