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人気のある微分積分 >

integral from 1 to e of 9t^2ln(t)

解

\int_{1}^{e} 9 t^{2} ln (t) d t

解

2 e^{3} + 1

+1

十進法表記

41.17107 \dots

解答ステップ

\int_{1}^{e} 9 t^{2} ln (t) d t

定数を除く:

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

= 9 \cdot \int_{1}^{e} t^{2} ln (t) d t

部分積分を適用する

= 9 [\frac{1}{3} (t^{3} ln (t) - 3 \cdot \int \frac{t ^{2}}{3} d t)]_{1}^{e}

\int \frac{t ^{2}}{3} d t = \frac{t ^{3}}{9}

= 9 [\frac{1}{3} (t^{3} ln (t) - 3 \cdot \frac{t ^{3}}{9})]_{1}^{e}

3 \cdot \frac{t ^{3}}{9} = \frac{t ^{3}}{3}

= 9 [\frac{1}{3} (t^{3} ln (t) - \frac{t ^{3}}{3})]_{1}^{e}

限度を計算する:

\frac{2 e ^{3}}{9} + \frac{1}{9}

= 9 (\frac{2 e ^{3}}{9} + \frac{1}{9})

簡素化

= 2 e^{3} + 1

グラフ

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