展开 (6(s+1))/(s^4)

解答

展开

\frac{6 ( s + 1 )}{s ^{4}}

\frac{6}{s ^{3}} + \frac{6}{s ^{4}}

求解步骤

\frac{6 ( s + 1 )}{s ^{4}}

乘开

6 (s + 1) : 6 s + 6

= \frac{6 s + 6}{s ^{4}}

使用分式法则:

\frac{a \pm b}{c} = \frac{a}{c} \pm \frac{b}{c}

\frac{6 s + 6}{s ^{4}} = \frac{6 s}{s ^{4}} + \frac{6}{s ^{4}}

= \frac{6 s}{s ^{4}} + \frac{6}{s ^{4}}

消掉

\frac{6 s}{s ^{4}} : \frac{6}{s ^{3}}

= \frac{6}{s ^{3}} + \frac{6}{s ^{4}}

e x p an d \frac{5 p ^{2} + 6 p - 6}{8 ( p + 1 ) ( p - 1 )}

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

e x p an d (3 - i)^{27}

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

\frac{\partial}{\partial x} ((z) (x z - y^{2}))