展开 (4s^3-3s^2+s-1)/(s^2(s-1)(s^2-2s+5))

解答

展开

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

\frac{4 s ^{3} - 3 s ^{2} + s - 1}{s ^{5} - 3 s ^{4} + 7 s ^{3} - 5 s ^{2}}

求解步骤

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

乘开

s^{2} (s - 1) (s^{2} - 2 s + 5) : s^{5} - 3 s^{4} + 7 s^{3} - 5 s^{2}

= \frac{4 s ^{3} - 3 s ^{2} + s - 1}{s ^{5} - 3 s ^{4} + 7 s ^{3} - 5 s ^{2}}

e x p an d sin ((a x - b t)^{2}) (2 a^{2} x - 2 ab t)

e x p an d (- w^{2} t - l cos (θ) w^{2}) (l sin (θ))

s im pl i f y 2 (8 + 3 + 6)

e x p an d ∣ (1 - a c - b d) + (b c - a d) i ∣

e x p an d \frac{3}{s + 2} + \frac{7 s + 4}{s ^{2} - 2 s + 2}