Precalculus I--Part 3--Test 5

Precalculus Practice Exam

Part 3 Test 5 Time: 1 hour

- Explain why the graph of a rational function cannot cross its vertical asymptote.
- Where does the rational function
  
  cross its horizontal asymptote?
- If
  
  estimate the value of the function when x=20,000,000,000,000,000 using oblique(slant) asymptote. Will this estimate be more or less than the actual value of the function at x=20,000,000,000,000,000? Why?
Let .
- Find .
- State the range and domain of and g(x).
- Sketch both functions on the same coordinate axis.
Answer the following:
- For which values of x is ?
- For which values of x is ?
- For which values of x is ?
- For which values of x is ?
Find all the solutions of the system
- Using the method of substitution,
- By sketching the graphs of both equations.
Suppose that $9500 is invested at 7.6% interest compounded monthly. How long will it take for the amount in the account to reach $20,000?

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Tue Jul 1 16:27:20 MDT 1997