展开-1/(s^2(s+1))

解答

展开

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

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

求解步骤

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

乘开

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

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

e x p an d ((e^{x} - e^{- x}))^{2}

e x p an d y (I n y^{2} - V y + 1) V d x + x d V - V y d y

e x p an d \frac{4 ( - y + 9 )}{5}

e x p an d (x^{2} y - 2 x) d x + (y - 2 x) d y

e x p an d a (4, - 6) b (3, 8)