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KVPY2011MathematicsDefinite Integration

Let f:(2, ) N be defined by f(x)= the largest prime factor of [x] . Then ₂⁸ f(x) d x is equal to -

Options

  1. A17
  2. B22
  3. C23
  4. D25

Correct answer

B. 22

Step-by-step solution

₂⁸ f(x) d x=2+3+2+5+3+7=22

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