## Precalculus Practice Exam

Part 3 Test 3 Time: 1 hour

• Write the expression

as one simplified " " term.

• Determine the domain that makes the original expression equivalent to the final expression.

1. Solve the following equation for x:

• Solve the following equation for x:

• What is the common domain of the two functions?

2. The half-life of Ra is 1,620 years. How long before the sample reduces to 67% of the original amount?

3. Find the special parabola that contains the points (3,26), (-2,21), and (1,6).

• Find the inverse of the function .
• Give the domain and range for f(x) and .

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Sun Jun 22 21:14:04 MDT 1997

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