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IKMC 2013 - Grades 11-12 - Paper 01 - Self-study Question 14

IKMC · IKMC 2013 - Grades 11-12 - Paper 01 - Self-study

Question 14

For a function on the integers, consider: “For every even x, f(x) is even.” What is its negation?
  1. For every even x, f(x) is odd.
  2. For every odd x, f(x) is even.
  3. For every odd x, f(x) is odd.
  4. There exists an even x with f(x) odd.
  5. There exists an odd x with f(x) odd.