Math Dump /sym/7fd97a
id=1 · host=jp.commstar.world · 2026-10-20 17:21Z
∑_{k=1}^{n} k = n(n+1)/2
∑_{k=1}^{n} k = n(n+1)/2
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det| 7 4 ; 4 8 | = 40
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8β² + 2β + 0 = 0
det| 5 9 ; 7 6 | = -33
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∑_{k=1}^{n} k = n(n+1)/2
det| 3 7 ; 2 4 | = -2
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det| 5 9 ; 0 6 | = 30
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\lim_{r\to 0} \frac{\sin r}{r} = 1
Fe₂O₃ + 3CO → 2Fe + 3CO₂
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