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


Evaluate each of the following expressions.

  1. Use a graph or substitute into the expression since there is not a division by zero problem.

  2. Substitute  for  in the expression.

  3. if

  4. if

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