### Home > PC > Chapter 9 > Lesson 9.2.2 > Problem 9-86

9-86.

**Challenge: **Given .

Use the fact that

and to show that . At this point, can you find

.? Explain. No, you would have division by

. Find the resulting equation when multiplying by

. It is known that

. Use this fact and your answer to part (c) to show that when for is applied, the result is.