展开 2/((2s+1)(s+1))

解答

展开

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

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

求解步骤

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

乘开

(2 s + 1) (s + 1) : 2 s^{2} + 3 s + 1

= \frac{2}{2 s ^{2} + 3 s + 1}

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

e x p an d \frac{2 ( - 2 e ^{- x} cos ( 2 x ) - e ^{- x} sin ( 2 x ) )}{5}

e x p an d (x^{2} y - x^{2} + y - 1) d x + (x y + 2 x - 3 y - 6) d y

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

e x p an d 35 + \frac{7 π}{5} - 2 (5 - 3 π)