How do you decompose the fraction
$$\frac1{s(n-s)} $$
to two fractions?
($s$ and $n$ are variables).
2026-03-30 08:55:50.1774860950
Partial Fractions Question: $\frac1{s(n-s)}$
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One may write, $$ \frac1{s(n-s)}=\frac1{n}\frac{n}{s(n-s)}=\frac1{n}\frac{(n-s)+s}{s(n-s)}=\frac1{n}\left(\frac1s+\frac1{n-s} \right)=\frac1{ns}+\frac1{n(n-s)}. $$