What is the integral of 1/(1+11x) ?

The integral of 1/(1+11x) is 1/11 ln|1+11x|+C

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integral of 1/(1+11x)

\int \frac{1}{1 + 11 x} d x

\frac{1}{11} ln ∣ 1 + 11 x ∣ + C

Solution steps

\int \frac{1}{1 + 11 x} d x

Apply u-substitution

: \int \frac{1}{11 u} d u

= \int \frac{1}{11 u} d u

Take the constant out:

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

= \frac{1}{11} \cdot \int \frac{1}{u} d u

Use the common integral:

\int \frac{1}{u} d u = ln (∣ u ∣)

= \frac{1}{11} ln ∣ u ∣

Substitute back

u = 1 + 11 x

= \frac{1}{11} ln ∣ 1 + 11 x ∣

Add a constant to the solution

= \frac{1}{11} ln ∣ 1 + 11 x ∣ + C

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x \to 4 lim (x \cdot 5)

x \to \infty lim (x + \frac{1}{x})

\int_{2}^{10} (- 4) d x

\frac{d}{d x} (x sin (ln (x)))

What is the integral of 1/(1+11x) ?
The integral of 1/(1+11x) is 1/11 ln|1+11x|+C