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Black Book Advanced Problems in MathematicsMathematicsContinuity and Differentiability

**Paragraph for Question Nos. 1 to 2** Let f(x) = _ n n^2 ( ( x n ) ) and g(x) = (f(x), x ) (where denotes fractional part function) Number of points in x [-1, 2] at which g(x) is discontinuous :

Options

  1. A2
  2. B1
  3. C0
  4. D3

Correct answer

A. 2

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