Field Notes / Σ /sym/b26508
id=1 · host=uk.mattivster.me · 2026-10-18 00:20Z
∑_{k=1}^{n} k = n(n+1)/2
\oint_C \vec{F}\cdot d\vec{r} = 0
144K
\oint_C \vec{F}\cdot d\vec{r} = 0
det| 7 9 ; 4 8 | = 20
90K
∑_{k=1}^{n} k = n(n+1)/2
438K
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
\binom{n}{k} = \frac{n!}{k!(n-k)!}
394K
7z² + 2z + 5 = 0
det| 9 3 ; 3 10 | = 81
94K
∫₀^∞ e^(-x²) dx = √π / 2
211K
\binom{n}{k} = \frac{n!}{k!(n-k)!}
d/dz [z^11] = 11z^10
352K
\lim_{r\to 0} \frac{\sin r}{r} = 1
16K