What is the integral from-1 to 2 of 1/(x^{2/3)} ?

The integral from-1 to 2 of 1/(x^{2/3)} is 3+3*2^{1/3}

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integral from-1 to 2 of 1/(x^{2/3)}

\int_{- 1}^{2} \frac{1}{x ^{\frac{2}{3}}} d x

3 + 3 \cdot 2^{\frac{1}{3}}

Decimal

6.77976 \dots

Solution steps

\int_{- 1}^{2} \frac{1}{x ^{\frac{2}{3}}} d x

Find undefined (singularity) points:

x = 0

If exist

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

undefined

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

= \int_{- 1}^{0} \frac{1}{x ^{\frac{2}{3}}} d x + \int_{0}^{2} \frac{1}{x ^{\frac{2}{3}}} d x

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

\int_{0}^{2} \frac{1}{x ^{\frac{2}{3}}} d x = 3 \cdot 2^{\frac{1}{3}}

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

Simplify

- 3 (- 1)^{\frac{1}{3}} + 3 \cdot 2^{\frac{1}{3}} : 3 + 3 \cdot 2^{\frac{1}{3}}

= 3 + 3 \cdot 2^{\frac{1}{3}}

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What is the integral from-1 to 2 of 1/(x^{2/3)} ?
The integral from-1 to 2 of 1/(x^{2/3)} is 3+3*2^{1/3}