In Exercises 49 and 50 use set notation to describe the shaded region. The following figures show how to shade regions of Venn Diagrams for two sets. B is the region that is in A or B or both so you need all the shaded regions.
A intersect B A union B A A intersect B A intersect B A union B A union B A union B A intersect B A intersect B A union B.
We will often use set builder notation to describe these regions. Keep in mind that the shaded region has more than one set description. B is the region that is in A or B or both so you need all the shaded regions. Use set notation to identify the shaded region in the Venn diagram.