Selecting regions for use with the disk method.

Figure 1 shows examples of regions R which when revolved about the x-axis generate solids whose volume can be computed using th e disk method. 

Figure 1.

Figure 2 illustrates several regions which when revolved about the x-axis generate solids whose volume can not be computed using (a single application of) the disk method.

Figure 2.

 

Constructed 3/1/2002             Last updated 5/19/2006 DRH