展开-(21ln(2))/(20(1-e^{\frac{3ln(2)){20}})}

解答

展开

- \frac{21 ln ( 2 )}{20 ( 1 - e ^{\frac{3 l n ( 2 )}{20}} )}

- \frac{21 ln ( 2 )}{20 - 20 e ^{\frac{3 l n ( 2 )}{20}}}

十进制

6.64240 \dots

求解步骤

- \frac{21 ln ( 2 )}{20 ( 1 - e ^{\frac{3 l n ( 2 )}{20}} )}

乘开

20 (1 - e^{\frac{3 l n ( 2 )}{20}}) : 20 - 20 e^{\frac{3 l n ( 2 )}{20}}

= - \frac{21 ln ( 2 )}{- 20 e ^{\frac{3 l n ( 2 )}{20}} + 20}

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