What is the integral of (x+7)/(x^2+x) ?

The integral of (x+7)/(x^2+x) is 7ln|x|-6ln|x+1|+C

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integral of (x+7)/(x^2+x)

\int \frac{x + 7}{x ^{2} + x} d x

7 ln ∣ x ∣ - 6 ln ∣ x + 1 ∣ + C

Solution steps

\int \frac{x + 7}{x ^{2} + x} d x

Take the partial fraction of

\frac{x + 7}{x ^{2} + x} : \frac{7}{x} - \frac{6}{x + 1}

= \int \frac{7}{x} - \frac{6}{x + 1} 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 \frac{7}{x} d x - \int \frac{6}{x + 1} d x

\int \frac{7}{x} d x = 7 ln ∣ x ∣

\int \frac{6}{x + 1} d x = 6 ln ∣ x + 1 ∣

= 7 ln ∣ x ∣ - 6 ln ∣ x + 1 ∣

Add a constant to the solution

= 7 ln ∣ x ∣ - 6 ln ∣ x + 1 ∣ + C

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What is the integral of (x+7)/(x^2+x) ?
The integral of (x+7)/(x^2+x) is 7ln|x|-6ln|x+1|+C