integral from-8 to 64 of 1/(x^{1/3)}

解

\int_{- 8}^{64} \frac{1}{x ^{\frac{1}{3}}} d x

18

解答ステップ

\int_{- 8}^{64} \frac{1}{x ^{\frac{1}{3}}} d x

未定義の (特異) 点を求める:

x = 0

存在する場合は

b, a < b < c, f (b) =

未定義

, \int_{a}^{c} f (x) d x = \int_{a}^{b} f (x) d x + \int_{b}^{c} f (x) d x

= \int_{- 8}^{0} \frac{1}{x ^{\frac{1}{3}}} d x + \int_{0}^{64} \frac{1}{x ^{\frac{1}{3}}} d x

\int_{- 8}^{0} \frac{1}{x ^{\frac{1}{3}}} d x = - 6 (- 1)^{\frac{2}{3}}

\int_{0}^{64} \frac{1}{x ^{\frac{1}{3}}} d x = 24

= - 6 (- 1)^{\frac{2}{3}} + 24

簡素化

- 6 (- 1)^{\frac{2}{3}} + 24 : 18

= 18