展开 (4(sqrt(10)-1))/3

解答

展开

\frac{4 ( 10 - 1 )}{3}

\frac{4 10}{3} - \frac{4}{3}

十进制

2.88303 \dots

求解步骤

\frac{4 ( 10 - 1 )}{3}

乘开

4 (10 - 1) : 410 - 4

= \frac{4 10 - 4}{3}

使用分式法则:

\frac{a \pm b}{c} = \frac{a}{c} \pm \frac{b}{c}

\frac{4 10 - 4}{3} = \frac{4 10}{3} - \frac{4}{3}

= \frac{4 10}{3} - \frac{4}{3}

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