展开 1/(s(s^2+4))

解答

展开

\frac{1}{s ( s ^{2} + 4 )}

\frac{1}{s ^{3} + 4 s}

求解步骤

\frac{1}{s ( s ^{2} + 4 )}

乘开

s (s^{2} + 4) : s^{3} + 4 s

= \frac{1}{s ^{3} + 4 s}

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