In this tutorial we shall explain integration of natural logarithmic function it is an important integral function, but it has no direct method to find we shall find the integration of by using integration by parts method.

The integration of is of the form

By using integration by parts, it must have at least two functions, it in this function it has only one function that is , now consider second function as . Now the integration becomes

Take first function is and second function will be

Using formula for integration by parts, we have

Equation (i) becomes using above formula, we have

Now in further study in integration we can use this integration of as a formula.