展开 ((s-1))/(s^2(s+1)(s-2))

解答

展开

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

\frac{s - 1}{s ^{4} - s ^{3} - 2 s ^{2}}

求解步骤

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

乘开

s^{2} (s + 1) (s - 2) : s^{4} - s^{3} - 2 s^{2}

= \frac{s - 1}{s ^{4} - s ^{3} - 2 s ^{2}}

e x p an d \frac{( 9 + y ^{4} ) sin ( x )}{y}

e x p an d e^{\frac{( 1 + x ) ^{2}}{2}}

e x p an d (6 + e^{- 6 t})^{4}

e x p an d 6 x^{2} - 14 x - 5 + 3 x

e x p an d \frac{( x + 4 ) ( x + 2 )}{2}