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人気のある微分積分 >

面積 y=8x^2,y^2= 1/8 x

解

面積

y = 8 x^{2}, y^{2} = \frac{1}{8} x

解

\frac{1}{192}

+1

十進法表記

0.00520 \dots

解答ステップ

以下のために

y

を分離:

y^{2} = \frac{1}{8} x : y = \frac{x}{2 2}, y = - \frac{x}{2 2}

f_{1} (x) = 8 x^{2}

f_{2} (x) = \frac{x}{2 2}

交点を見つけるには以下を解く:

f_{i} (x) = f_{j} (x)

8 x^{2} = \frac{x}{2 2} : x = 0, x = \frac{1}{8}

8 x^{2} = - \frac{x}{2 2} : x = 0

\frac{x}{2 2} = - \frac{x}{2 2} : x = 0

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

= \int_{0}^{\frac{1}{8}} 8 x^{2} - \frac{x}{2 2} d x

\int_{0}^{\frac{1}{8}} 8 x^{2} - \frac{x}{2 2} d x = \frac{1}{192}

= \frac{1}{192}

グラフ

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