化简 x^3(r(r-1)(r-2)x^{(r-3)})

解答

化简

x^{3} (r (r - 1) (r - 2) x^{(r - 3)})

r x^{r} (r - 1) (r - 2)

求解步骤

x^{3} (r (r - 1) (r - 2) x^{(r - 3)})

使用指数法则:

a^{b} \cdot a^{c} = a^{b + c}

x^{3} x^{r - 3} = x^{3 + r - 3}

= r (r - 1) (r - 2) x^{3 + r - 3}

化简

3 + r - 3 : r

= r x^{r} (r - 1) (r - 2)

s im pl i f y 70 a^{3} b^{3}

s im pl i f y 360

s im pl i f y V (- 3.2 7) so l u c i o n

s im pl i f y e^{- \frac{0.693 \cdot 3}{12.4}}

s im pl i f y (a + 2 b)^{2} \cdot (a - 2 b)^{2}