展开 l(e^{4t}sin(t)-e^{2t}cos(4t))

解答

展开

l (e^{4 t} sin (t) - e^{2 t} cos (4 t))

l e^{4 t} sin (t) - l e^{2 t} cos (4 t)

求解步骤

l (e^{4 t} sin (t) - e^{2 t} cos (4 t))

使用分配律:

a (b - c) = ab - a c

a = l, b = e^{4 t} sin (t), c = e^{2 t} cos (4 t)

= l e^{4 t} sin (t) - l e^{2 t} cos (4 t)

e x p an d \frac{6}{y} \cdot \frac{( x + y )}{4}

s im pl i f y x^{\frac{2}{3}} \cdot (\frac{5}{2} - x)

e x p an d \frac{8}{3 p} + \frac{5}{4 p} + \frac{9}{2 p}

e x p an d (7 - 10) \cdot (3 - 19)

e x p an d e^{t x - \frac{( x - u ) ^{2}}{2 o ^{2}}}