Physics I / Limits and continuity
Practice question · Multiple choice

A function satisfies f(2)=5f(2) = 5, but limx2f(x)=3\lim_{x\to 2} f(x) = 3. What does the graph look like near x=2x = 2?

Hints
  1. The limit reports where the curve is heading; the value reports where the point was placed. They are independent pieces of data.
  2. Approach from both sides along the curve, you drift toward 3. The definition f(2)=5f(2)=5 just parks a dot elsewhere.
Show the answer

C. The curve heads toward 3, with a lone dot at 5

Why

This is a removable discontinuity: the curve funnels toward 3, but someone stuck the actual point at 5. Continuity is precisely the demand that these two, the heading and the landing, agree.

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