展开 1/((s-1)(s^2+1))

解答

展开

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

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

求解步骤

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

乘开

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

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

s im pl i f y \frac{1}{125} (25 t + 13) sin (5 t) + (t + \frac{1}{25}) cos (5 t)

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

e x p an d \frac{2 s + 8}{( s + 1 ) ( s + 2 )}

e x p an d (\frac{1}{x} i - 1)^{3}

e x p an d A (- 3, 6) y B (3, - 2)