### Home > PC3 > Chapter 7 > Lesson 7.1.4 > Problem 7-47

7-47.

Evaluate each of the following expressions.

Use a graph or substitute

into the expression since there is not a division by zero problem. Substitute

for in the expression. ifif Compare your answers to parts (a) and (c) and parts (b) and (d). What can you conclude about

and? Explain.