展开 ,Va(8/(8+1))(1+(10)/(1.25))

解答

展开

, Va (\frac{8}{8 + 1}) (1 + \frac{10}{1.25})

+, 1 \cdot (\frac{8}{8 + 1}) Va, (\frac{8}{8 + 1}) \frac{10}{1.25} Va

求解步骤

, Va (\frac{8}{8 + 1}) (1 + \frac{10}{1.25})

=, (\frac{8}{8 + 1}) (1 + \frac{10}{1.25}) Va

使用分配律:

a (b + c) = ab + a c

a = +, Va (\frac{8}{8 + 1}), b = 1, c = \frac{10}{1.25}

= +, Va (\frac{8}{8 + 1}) \cdot 1 +, Va (\frac{8}{8 + 1}) \frac{10}{1.25}

= +, 1 \cdot (\frac{8}{8 + 1}) Va, (\frac{8}{8 + 1}) \frac{10}{1.25} Va

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