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Popular Calculus >

integral of (3x+1)/x

Solution

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

Solution

3 x + ln ∣ x ∣ + C

Solution steps

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

Expand

\frac{3 x + 1}{x} : 3 + \frac{1}{x}

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

\int 3 d x = 3 x

\int \frac{1}{x} d x = ln ∣ x ∣

= 3 x + ln ∣ x ∣

Add a constant to the solution

= 3 x + ln ∣ x ∣ + C

Graph

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Frequently Asked Questions (FAQ)

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