What is the integral from 0 to 1 of 2pix(3x(x-2)^2) ?

The integral from 0 to 1 of 2pix(3x(x-2)^2) is (16pi)/5

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 2pix(3x(x-2)^2)

\int_{0}^{1} 2 π x (3 x (x - 2)^{2}) d x

\frac{16 π}{5}

Decimal

10.05309 \dots

Solution steps

\int_{0}^{1} 2 π x \cdot 3 x (x - 2)^{2} d x

Take the constant out:

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

= 2 π 3 \cdot \int_{0}^{1} xx (x - 2)^{2} d x

Simplify

= 6 π \cdot \int_{0}^{1} xx (x - 2)^{2} d x

Expand

xx (x - 2)^{2} : x^{4} - 4 x^{3} + 4 x^{2}

= 6 π \cdot \int_{0}^{1} x^{4} - 4 x^{3} + 4 x^{2} d x

Apply the Sum Rule:

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

= 6 π (\int_{0}^{1} x^{4} d x - \int_{0}^{1} 4 x^{3} d x + \int_{0}^{1} 4 x^{2} d x)

\int_{0}^{1} x^{4} d x = \frac{1}{5}

\int_{0}^{1} 4 x^{3} d x = 1

\int_{0}^{1} 4 x^{2} d x = \frac{4}{3}

= 6 π (\frac{1}{5} - 1 + \frac{4}{3})

Simplify

6 π (\frac{1}{5} - 1 + \frac{4}{3}) : \frac{16 π}{5}

= \frac{16 π}{5}

What is the integral from 0 to 1 of 2pix(3x(x-2)^2) ?
The integral from 0 to 1 of 2pix(3x(x-2)^2) is (16pi)/5