展开 10(2e-2/e)

解答

展开

10 (2 e - \frac{2}{e})

20 e - \frac{20}{e}

十进制

47.00804 \dots

求解步骤

10 (2 e - \frac{2}{e})

使用分配律:

a (b - c) = ab - a c

a = 10, b = 2 e, c = \frac{2}{e}

= 10 \cdot 2 e - 10 \cdot \frac{2}{e}

化简

10 \cdot 2 e - 10 \cdot \frac{2}{e} : 20 e - \frac{20}{e}

= 20 e - \frac{20}{e}

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