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Black Book Advanced Problems in MathematicsMathematicsFunctions

If [5 x] + [ x] + 6 = 0 , then range of f(x) = 3 x + x corresponding to solution set of the given equation is : (where [ ] denotes greatest integer function)

Options

  1. A[-2, -1)
  2. B[ - 3 3 + 2 5 , -1 )
  3. C[-2, - 3 )
  4. D[ - 3 3 + 4 5 , -1 )

Correct answer

D. [ - 3 3 + 4 5 , -1 )

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