### 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.

if

if

Compare your answers to parts (a) and (c) and parts (b) and (d). What can you conclude about

and? Explain.