展开 2/((s(s+1)(s+4)))

解答

展开

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

\frac{2}{s ^{3} + 5 s ^{2} + 4 s}

求解步骤

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

乘开

s (s + 1) (s + 4) : s^{3} + 5 s^{2} + 4 s

= \frac{2}{s ^{3} + 5 s ^{2} + 4 s}

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

s im pl i f y (a + 1 - a - 1)^{2}

e x p an d 2 y d x + x (x^{2} ln (y) - 1) d y

e x p an d sin (5 (t - w))

e x p an d \frac{2 x + 1}{( x + 1 ) ^{3} ( x ^{2} + 4 ) ^{2}}