展开 (s^2+s+1-e^{-pis})/(s(s^2+4))

解答

展开

\frac{s ^{2} + s + 1 - e ^{- π s}}{s ( s ^{2} + 4 )}

\frac{s ^{2} + s + 1 - e ^{- π s}}{s ^{3} + 4 s}

求解步骤

\frac{s ^{2} + s + 1 - e ^{- π s}}{s ( s ^{2} + 4 )}

乘开

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

= \frac{s ^{2} + s + 1 - e ^{- π s}}{s ^{3} + 4 s}

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

e x p an d \frac{x ^{2} ( 8 y ^{3} + 3 x ) ^{2}}{16}

e x p an d \frac{1}{( s ^{2} + a ^{2} ) \cdot ( s ^{2} + b ^{2} )}

\frac{d ^{2}}{d y ^{2}} ((f (x)) (x (y - sin (y))))

e x p an d \frac{4 x ^{2} - 24 x - 52}{( x - 3 ) ^{2}}