展开 1/(S(S^2+0.2S+1))

解答

展开

\frac{1}{S ( S ^{2} + 0.2 S + 1 )}

\frac{1}{S ^{3} + 0.2 S ^{2} + S}

求解步骤

\frac{1}{S ( S ^{2} + 0.2 S + 1 )}

乘开

S (S^{2} + 0.2 S + 1) : S^{3} + 0.2 S^{2} + S

= \frac{1}{S ^{3} + 0.2 S ^{2} + S}

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