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Black Book Advanced Problems in MathematicsMathematicsFunctions

If [x]^2 - 7[x] + 10 < 0 and 4[y]^2 - 16[y] + 7 < 0 , then [x + y] cannot be ( [ ] denotes greatest integer function) :

Options

  1. A7
  2. B8
  3. C9
  4. Dboth (b) and (c)

Correct answer

C. 9

Step-by-step solution

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