What is the integral of ((x+1)^3)/(x^2) ?

The integral of ((x+1)^3)/(x^2) is (x^2)/2+3x+3ln|x|-1/x+C

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integral of ((x+1)^3)/(x^2)

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

\frac{x ^{2}}{2} + 3 x + 3 ln ∣ x ∣ - \frac{1}{x} + C

Solution steps

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

Expand

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

= \int x + 3 + \frac{3}{x} + \frac{1}{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

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

\int x d x = \frac{x ^{2}}{2}

\int 3 d x = 3 x

\int \frac{3}{x} d x = 3 ln ∣ x ∣

\int \frac{1}{x ^{2}} d x = - \frac{1}{x}

= \frac{x ^{2}}{2} + 3 x + 3 ln ∣ x ∣ - \frac{1}{x}

Add a constant to the solution

= \frac{x ^{2}}{2} + 3 x + 3 ln ∣ x ∣ - \frac{1}{x} + C

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What is the integral of ((x+1)^3)/(x^2) ?
The integral of ((x+1)^3)/(x^2) is (x^2)/2+3x+3ln|x|-1/x+C