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Question of the Day for 11/12/2026
 
Subject: Calculus


The graph of the function f shown in the figure above has a vertical tangent at the point (2,0) and horizontal tangents at the points (1,1) and (3,1). For what value so f(x), 2<x<4, is f not differentiable?
  1. 0
  2. 0 and 2
  3. 1 and 3
  4. 0, 1, and 3
  5. 0, 1, 2, and 3

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