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12-95.
  1. Multiple Choice: Which of the following statements must be true of the function f(x) defined below? Homework Help ✎

    1. f(x) is continuous at x = −2.

    2. f(x) is differentiable at x = −2.

    3. f(x) is differentiable at x = 0.5 .

    1. I only

    2. II only

    3. I and III only

    4. II and III only

    5. I and II only

Therefore f is continuous at x = –2.

Therefore f is not differentiable at x = –2.