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State the domain of each of the following functions. Note: The functions mentioned in parts (c) and (d) refer to those in parts (a) and (b).

  1. which has a vertical asymptote at . also has a vertical asymptote. Where is it, and how will the vertical asymptote restrict the domain?

  2. which does not exist for negative values of . What can you conclude about .

  3. Both the square root and the denominator have restricted domains. Combine.

  4. Refer to hints in part (c).