展开-3/((s)(s-4)(s-1))

解答

展开

- \frac{3}{( s ) ( s - 4 ) ( s - 1 )}

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

求解步骤

- \frac{3}{( s ) ( s - 4 ) ( s - 1 )}

去除括号:

(a) = a

= - \frac{3}{s ( s - 4 ) ( s - 1 )}

乘开

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

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

s im pl i f y (x + 1) \cdot (2 x^{2} + 1)

e x p an d A (- 9, - 1, 8) y B (- 7, 5, 6)

s im pl i f y (16 + tan (x)) (16 - tan (x)) + sec^{2} (x)

e x p an d \frac{( x - 2 ) ( x - 3 )}{2}

e x p an d \frac{s + 2}{( ( s + 2 ) ^{2} + 9 ) \cdot ( s + 2 ) ^{2}}