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

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

Popular >

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

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

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

Solution steps

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

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

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

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

\int 1 d x = x

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

Add a constant to the solution

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

\int cos (θ) tan (θ) d θ

\int (2 x y^{2} - y^{3}) d x

\int 60 (1 + x^{2}) (7 + 15 x + 5 x^{3})^{12} d x

\int 10 e^{t} - t e^{t} + 1 d t

\int \frac{1}{( x + 9 ) ^{2}} d x

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