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Calculus 2nd Edition Rogawski

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70 CHAPTER 2 LIMITS<br />

50. Sawtooth Function Draw the graph of f (x) = x − [x]. At<br />

which points is f discontinuous? Is it left- or right-continuous at those<br />

points?<br />

In Exercises 51–54, sketch the graph of f (x). At each point of discontinuity,<br />

state whether f is left- or right-continuous.<br />

{<br />

x 2 for x ≤ 1<br />

51. f (x) =<br />

2 − x for x>1<br />

⎧<br />

⎨x + 1 for x

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