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If , evaluate the expressions in parts (a) through (c) below. Then complete parts (d) and (e).

Substitute for and simplify.

Refer to part (a).

Refer to part (a).

  1. What value of gives

Substitute for and solve for .

  1. Where does the graph of this function cross the axis? The ‑axis? Use this information to sketch the graph.

A function crosses the -axis at , and a function crosses the -axis at .

Use the eTool below to find the value of each expression in parts (a) through (c).
Click on the link at right for the full eTool version: Int1 8-123 HW eTool.