What is the integral of sqrt(1-x)x ?

The integral of sqrt(1-x)x is 2/5 (1-x)^{5/2}-2/3 (1-x)^{3/2}+C

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

integral of sqrt(1-x)x

\int 1 - x x d x

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

Solution steps

\int 1 - x x d x

Apply u-substitution

: \int - (- u + 1) u d u

= \int - (- u + 1) u d u

Take the constant out:

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

= - \int (- u + 1) u d u

Expand

(- u + 1) u : - u^{\frac{3}{2}} + u

= - \int - u^{\frac{3}{2}} + u d u

Apply the Sum Rule:

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

= - (- \int u^{\frac{3}{2}} d u + \int u d u)

\int u^{\frac{3}{2}} d u = \frac{2}{5} u^{\frac{5}{2}}

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

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

Substitute back

u = 1 - x

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

Simplify

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

Add a constant to the solution

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

\int \frac{1}{8 ( x ^{2} + 1 )} d x

\int - \frac{x ^{3}}{3} d x

\int 9 x x^{2} + 5 d x

\int \frac{2 x ^{2}}{2 x ^{2} - 3 x + 1} d x

\int sin^{2} (\frac{2 π x}{a}) d x

What is the integral of sqrt(1-x)x ?
The integral of sqrt(1-x)x is 2/5 (1-x)^{5/2}-2/3 (1-x)^{3/2}+C