Math Dump /sym/6c3138
id=1 · host=fr.findroms.cloud · 2026-10-18 00:34Z
\binom{n}{k} = \frac{n!}{k!(n-k)!}
∑_{k=1}^{n} k = n(n+1)/2
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d/dx [x^7] = 7x^6
det| 7 4 ; 4 8 | = 40
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\binom{n}{k} = \frac{n!}{k!(n-k)!}
det| 4 7 ; 2 5 | = 6
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det| 9 5 ; 1 10 | = 85
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∑_{k=1}^{n} k = n(n+1)/2
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