展开 3(1-1/e)

解答

展开

3 (1 - \frac{1}{e})

3 - \frac{3}{e}

十进制

1.89636 \dots

求解步骤

3 (1 - \frac{1}{e})

使用分配律:

a (b - c) = ab - a c

a = 3, b = 1, c = \frac{1}{e}

= 3 \cdot 1 - 3 \cdot \frac{1}{e}

化简

3 \cdot 1 - 3 \cdot \frac{1}{e} : 3 - \frac{3}{e}

= 3 - \frac{3}{e}

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