展开 \H(t-a)f(t-a)

解答

展开

H (t - a) f (t - a)

t f H (t - a) - a f H (t - a)

求解步骤

H (t - a) f (t - a)

= f H (t - a) (t - a)

使用分配律:

a (b - c) = ab - a c

a = H (t - a) f, b = t, c = a

= H (t - a) f t - H (t - a) f a

= t f H (t - a) - a f H (t - a)

s im pl i f y (3 - x - 3)^{2}

e x p an d P (- 1, - 1) C (3, 5)

e x p an d \frac{sin ( x + h ) - sin ( x )}{h}

\frac{\partial}{\partial x} ((z) (e^{2 z} - x yz))

e x p an d \frac{3 ( x - 1 )}{4}