What is the integral from 0 to 1 of pi(xe^x)^2 ?

The integral from 0 to 1 of pi(xe^x)^2 is (pi(e^2-1))/4

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

integral from 0 to 1 of pi(xe^x)^2

\int_{0}^{1} π (x e^{x})^{2} d x

\frac{π ( e ^{2} - 1 )}{4}

Decimal

5.01795 \dots

Solution steps

\int_{0}^{1} π (x e^{x})^{2} d x

Take the constant out:

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

= π \cdot \int_{0}^{1} (x e^{x})^{2} d x

Simplify

(x e^{x})^{2} : e^{2 x} x^{2}

= π \cdot \int_{0}^{1} e^{2 x} x^{2} d x

Apply Integration By Parts

= π [\frac{1}{2} e^{2 x} x^{2} - \int e^{2 x} x d x]_{0}^{1}

\int e^{2 x} x d x = \frac{1}{4} (e^{2 x} \cdot 2 x - e^{2 x})

= π [\frac{1}{2} e^{2 x} x^{2} - \frac{1}{4} (e^{2 x} \cdot 2 x - e^{2 x})]_{0}^{1}

Compute the boundaries:

\frac{e ^{2}}{4} - \frac{1}{4}

= π (\frac{e ^{2}}{4} - \frac{1}{4})

Simplify

= \frac{π ( e ^{2} - 1 )}{4}

What is the integral from 0 to 1 of pi(xe^x)^2 ?
The integral from 0 to 1 of pi(xe^x)^2 is (pi(e^2-1))/4