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人気のある微分積分 >

integral of x^3sqrt(7-x^2)

解

\int x^{3} 7 - x^{2} d x

解

\frac{1}{5} (7 - x^{2})^{\frac{5}{2}} - \frac{7}{3} (7 - x^{2})^{\frac{3}{2}} + C

解答ステップ

\int x^{3} 7 - x^{2} d x

u置換積分法を適用する

= \int - (- u^{2} + 7) u^{2} d u

定数を除く:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= - \int (- u^{2} + 7) u^{2} d u

拡張

(- u^{2} + 7) u^{2} : - u^{4} + 7 u^{2}

= - \int - u^{4} + 7 u^{2} d u

総和規則を適用する:

\int f (x) \pm g (x) d x = \int f (x) d x \pm \int g (x) d x

= - (- \int u^{4} d u + \int 7 u^{2} d u)

\int u^{4} d u = \frac{u ^{5}}{5}

\int 7 u^{2} d u = \frac{7 u ^{3}}{3}

= - (- \frac{u ^{5}}{5} + \frac{7 u ^{3}}{3})

代用を戻す

u = 7 - x^{2}

= - (- \frac{( 7 - x ^{2} ) ^{5}}{5} + \frac{7 ( 7 - x ^{2} ) ^{3}}{3})

簡素化

- (- \frac{( 7 - x ^{2} ) ^{5}}{5} + \frac{7 ( 7 - x ^{2} ) ^{3}}{3}) : \frac{1}{5} (7 - x^{2})^{\frac{5}{2}} - \frac{7}{3} (7 - x^{2})^{\frac{3}{2}}

= \frac{1}{5} (7 - x^{2})^{\frac{5}{2}} - \frac{7}{3} (7 - x^{2})^{\frac{3}{2}}

定数を解答に追加する

= \frac{1}{5} (7 - x^{2})^{\frac{5}{2}} - \frac{7}{3} (7 - x^{2})^{\frac{3}{2}} + C

グラフ

人気の例

derivative of 5+sin(x)

\frac{d}{d x} (5 + sin (x))

integral of (ln(x))/(x^4)

\int \frac{ln ( x )}{x ^{4}} d x

(\partial)/(\partial x)((x^2-y^2)/(1+x^2))

\frac{\partial}{\partial x} (\frac{x ^{2} - y ^{2}}{1 + x ^{2}})

面積 y=2-x^2,y=6-5x

a re a y = 2 - x^{2}, y = 6 - 5 x

f(x)=2x-3x^{2/3}

f (x) = 2 x - 3 x^{\frac{2}{3}}