### Home > CALC > Chapter 8 > Lesson 8.1.5 > Problem 8-52

8-52.

Let

*y*= 3^{x}^{ }+ 1*, y*= 0,*x*= 0, and*x*= 2. Find the volume of the region revolved about each of the lines below. Homework Help ✎*x*-axis*y*-axis*y*= −1Explain why

is the incorrect set-up for a washer given.

Be sure to sketch the region before beginning.

If *y* = 3* ^{x}* + 1, then

*x*= log

_{3}(

*y*− 1).

Notice, both the outer and the inner radii are 1 unit longer than in part (a).

True or False? *R*^{2} − *r*^{2} = (*R* − *r*)^{2}