What is the integral from 1 to 3 of 3/x ?

The integral from 1 to 3 of 3/x is 3ln(3)

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integral from 1 to 3 of 3/x

\int_{1}^{3} \frac{3}{x} d x

3 ln (3)

Decimal

3.29583 \dots

Solution steps

\int_{1}^{3} \frac{3}{x} d x

Take the constant out:

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

= 3 \cdot \int_{1}^{3} \frac{1}{x} d x

Use the common integral:

\int \frac{1}{x} d x = ln (∣ x ∣)

= 3 [ln ∣ x ∣]_{1}^{3}

Compute the boundaries:

ln (3)

= 3 ln (3)

What is the integral from 1 to 3 of 3/x ?
The integral from 1 to 3 of 3/x is 3ln(3)