化简 (3b)/(10b^3)

解答

化简

\frac{3 b}{10 b ^{3}}

\frac{3}{10 b ^{2}}

求解步骤

\frac{3 b}{10 b ^{3}}

使用指数法则:

\frac{x ^{a}}{x ^{b}} = \frac{1}{x ^{b - a}}

\frac{b ^{1}}{b ^{3}} = \frac{1}{b ^{3 - 1}}

= \frac{3}{10 b ^{3 - 1}}

数字相减:

3 - 1 = 2

= \frac{3}{10 b ^{2}}

s im pl i f y 1 + \frac{0.045}{12}

29.5 - 5.5 x = 7.5 (3 x + 3.5)

s im pl i f y a^{m} \cdot a^{n}

2 (5 x - 2) = 10 x - 4

x - (5 + 3 x - (5 x - (6 + x))) = - 3