展开 (s+1)/(s^2(s+3)(s+2))

解答

展开

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

\frac{s + 1}{s ^{4} + 5 s ^{3} + 6 s ^{2}}

求解步骤

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

乘开

s^{2} (s + 3) (s + 2) : s^{4} + 5 s^{3} + 6 s^{2}

= \frac{s + 1}{s ^{4} + 5 s ^{3} + 6 s ^{2}}

e x p an d \frac{( x + 1 ) ( x ^{5} - 4 x ^{4} + 4 x ^{3} - 6 x - 2 )}{x}

s im pl i f y (u - v)^{2}

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

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

e x p an d x^{2} (ln (x + 10) - 1)