展开 e^{4t}(t-cos(t)(t))

解答

展开

e^{4 t} (t - cos (t) (t))

e^{4 t} t - e^{4 t} t cos (t)

求解步骤

e^{4 t} (t - cos (t) (t))

= e^{4 t} (t - (t) cos (t))

使用分配律:

a (b - c) = ab - a c

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

= e^{4 t} t - e^{4 t} cos (t) (t)

= e^{4 t} t - e^{4 t} (t) cos (t)

去除括号:

(a) = a

= e^{4 t} t - e^{4 t} t cos (t)

s im pl i f y 316 \cdot (1 + \frac{s}{10})

e x p an d 9 (\frac{2}{13} x + \frac{3}{13} y)^{2}

e x p an d a^{x} \cdot (ln (a) + \frac{x}{a})

e x p an d (P - J)^{2} + (Q - K)^{2}

s im pl i f y (a + 55)^{2}