展开 (15(e-1))/(2e)

解答

展开

\frac{15 ( e - 1 )}{2 e}

\frac{15}{2} - \frac{15}{2 e}

十进制

4.74090 \dots

求解步骤

\frac{15 ( e - 1 )}{2 e}

乘开

15 (e - 1) : 15 e - 15

= \frac{15 e - 15}{2 e}

使用分式法则:

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

\frac{15 e - 15}{2 e} = \frac{15 e}{2 e} - \frac{15}{2 e}

= \frac{15 e}{2 e} - \frac{15}{2 e}

消掉

\frac{15 e}{2 e} : \frac{15}{2}

= \frac{15}{2} - \frac{15}{2 e}

\frac{\partial}{\partial t} ((z) (x^{2} + y^{5}))

e x p an d \frac{\frac{1 + s ^{2}}{s ^{2}}}{s ^{2} + 3}

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