imo class 12 relations and functions

Let f(x) = [x] (greatest integer function) and g(x) = |x|. The value of g(f(−5/3)) − f(g(−5/3)) is:

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Let f(x) = [x] (greatest integer function) and g(x) = |x|. The value of g(f(−5/3)) − f(g(−5/3)) is:

  • A. 0
  • B. 1
  • C. 2
  • D. −1

Answer: B) 1

Explanation: f(−5/3) = f(−1.66..) = −2. g(−2) = |−2| = 2. Also, g(−5/3) = |−5/3| = 5/3. f(5/3) = [1.66..] = 1. The expression evaluates to 2 − 1 = 1.

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