展开 f(t)-f(t-3)\H(t-3)

解答

展开

f (t) - f (t - 3) H (t - 3)

f t - f t H (t - 3) + 3 f H (t - 3)

求解步骤

f (t) - f (t - 3) H (t - 3)

= f (t) - f H (t - 3) (t - 3)

乘开

- f H (t - 3) (t - 3) : - f t H (t - 3) + 3 f H (t - 3)

= f (t) - f t H (t - 3) + 3 f H (t - 3)

去除括号:

(a) = a

= f t - f t H (t - 3) + 3 f H (t - 3)

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

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

e x p an d \frac{( 2 s + 1 ) ( s - 8 )}{s}

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

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