What is the integral of x/(x^2-15) ?

The integral of x/(x^2-15) is 1/2 ln|x^2-15|+C

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integral of x/(x^2-15)

\int \frac{x}{x ^{2} - 15} d x

\frac{1}{2} ln x^{2} - 15 + C

Solution steps

\int \frac{x}{x ^{2} - 15} d x

Apply u-substitution

: \int \frac{1}{2 u} d u

= \int \frac{1}{2 u} d u

Take the constant out:

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

= \frac{1}{2} \cdot \int \frac{1}{u} d u

Use the common integral:

\int \frac{1}{u} d u = ln (∣ u ∣)

= \frac{1}{2} ln ∣ u ∣

Substitute back

u = x^{2} - 15

= \frac{1}{2} ln x^{2} - 15

Add a constant to the solution

= \frac{1}{2} ln x^{2} - 15 + C

y = sin (2 t)

\int 4 cos^{4} (5 x) d x

f (x) = \frac{e ^{x}}{1 + e ^{x}}

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

\frac{d}{d t} (6 cos (t))

What is the integral of x/(x^2-15) ?
The integral of x/(x^2-15) is 1/2 ln|x^2-15|+C