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3-155.
  1. Re-examine your graph of from problem 3-154. Homework Help ✎

    1. As accurately as possible, draw a tangent to y at x = 2. Estimate its slope.

    2. According to your derivative, y′, what is the slope of the tangent at x = 2?

The tangent line should look vertical. What is the slope of a vertical line?

Refer to hints in problem 3-154.