Chapter 7 - Integration Techniques - 7.2 Integration by Parts - 7.2 Exercises - Page 520: 5

$$\eqalign{ & {\text{The presence of products in the integrand often suggests integration by parts}} \cr & {\text{}} \cr} $$

$$\eqalign{ & {\text{The integration by parts formula is the result of the reverse of the }} \cr & {\text{product rule for derivatives}}{\text{. Therefore, The presence of}} \cr & {\text{products in the integrand often suggests integration by parts}} \cr} $$