imo class 12 definite integration

Evaluate the integral involving the greatest integer function: ∫[0 to 1.5] [x] dx.

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Evaluate the integral involving the greatest integer function: ∫[0 to 1.5] [x] dx.

  • A. 0.5
  • B. 1
  • C. 1.5
  • D. 0

Answer: A) 0.5

Explanation: Split the integral where the integer value changes: ∫[0 to 1] 0 dx + ∫[1 to 1.5] 1 dx = 0 + [x] from 1 to 1.5 = 1.5 - 1 = 0.5.

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