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Paragraph: Let f(x)= [ ^2 ] x+ [- ^2 ] x where [.] is a greatest integer function. Question: What is f ( 4 ) equal to?

Options

  1. A- 1 2
  2. B-1
  3. C1
  4. D1 2

Correct answer

D. 1 2

Step-by-step solution

f ( 4 )= 9 4 + 10 4 = (2 + 4 )+ (2 + 2 )= 4 + 2 = 1 2

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