Integration by U-substitution method When the integrand is formed by a product (or a division, which we can treat like a product) it's recommended the use of the method known as integration by u-substitution, that consists in applying the following formula: Even though it's a simple formula, it has to be applied correctly. Let's see a few tips on how to apply it well: 1. Select u and dv correctly: as a rule, we will call u all powers and logarithms; and dv exponentials, fractions and...