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

8-52.

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}