5.4 Indefinite Integrals and the Net Change Theorem/39: Difference between revisions
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<math>\ | <math> | ||
\begin{align} | |||
\int_{1}^{64}\frac{1+\sqrt[3]{x}}\sqrt{x}dx &= \int_{1}^{64}\left(\frac{1}{x^{1/2}} + \frac{x^{1/3}}{x^{1/2}}\right)dx | |||
= \int_{1}^{64}\left(x^{-1/2}+x^{\frac{1}{3}-{\frac{1}{2}}}\right)dx = \int_{1}^{64}\left(x^{-\frac{1}{2}}+x^{-\frac{1}{6}}\right)dx \\[2ex] | |||
&= \left[\frac{x^{\frac{1}{2}}}{\frac{1}{2}}+ \frac{x^{\frac{5}{6}}}{\frac{5}{6}}\right]_{1}^{64} = \left[2x^\frac{1}{2} + \frac{6}{5}x^\frac{5}{6}\right]_{1}^{64} \\[2ex] | |||
&= \left[2(64)^\frac{1}{2} + \frac{6}{5}(64)^\frac{5}{6}\right] - \left[(2(1)^\frac{1}{2} + \frac{6}{5}(1)^\frac{5}{6})\right] \\[2ex] | |||
&= \left[2\cdot8 + \frac{6}{5}(2)^5\right] - \left[2+\frac{6}{5}\right] = \left[16+\frac{192}{5}\right] - \left[\frac{16}{5}\right] = \left[\frac{80}{5} + \frac{192}{5}\right] - \left[\frac{16}{5}\right]\\[2ex] | |||
&= \frac{256}{5} | |||
\end{align} | |||
</math> | |||
Latest revision as of 19:41, 21 September 2022
Failed to parse (Conversion error. Server ("https://en.wikipedia.org/api/rest_") reported: "Cannot get mml. Server problem."): {\displaystyle {\begin{aligned}\int _{1}^{64}{\frac {1+{\sqrt[{3}]{x}}}{\sqrt {x}}}dx&=\int _{1}^{64}\left({\frac {1}{x^{1/2}}}+{\frac {x^{1/3}}{x^{1/2}}}\right)dx=\int _{1}^{64}\left(x^{-1/2}+x^{{\frac {1}{3}}-{\frac {1}{2}}}\right)dx=\int _{1}^{64}\left(x^{-{\frac {1}{2}}}+x^{-{\frac {1}{6}}}\right)dx\\[2ex]&=\left[{\frac {x^{\frac {1}{2}}}{\frac {1}{2}}}+{\frac {x^{\frac {5}{6}}}{\frac {5}{6}}}\right]_{1}^{64}=\left[2x^{\frac {1}{2}}+{\frac {6}{5}}x^{\frac {5}{6}}\right]_{1}^{64}\\[2ex]&=\left[2(64)^{\frac {1}{2}}+{\frac {6}{5}}(64)^{\frac {5}{6}}\right]-\left[(2(1)^{\frac {1}{2}}+{\frac {6}{5}}(1)^{\frac {5}{6}})\right]\\[2ex]&=\left[2\cdot 8+{\frac {6}{5}}(2)^{5}\right]-\left[2+{\frac {6}{5}}\right]=\left[16+{\frac {192}{5}}\right]-\left[{\frac {16}{5}}\right]=\left[{\frac {80}{5}}+{\frac {192}{5}}\right]-\left[{\frac {16}{5}}\right]\\[2ex]&={\frac {256}{5}}\end{aligned}}}