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1951 AMC 12 Question 36

AMC12 · 1951 AMC 12

Question 36

Which of the following methods of proving a geometric figure a locus is not correct?
  1. Every point on the locus satisfies the conditions and every
    point not on the locus does not satisfy the conditions.
  2. Every point not satisfying the conditions is
    not on the locus and every point on the locus does satisfy the
    conditions.
  3. Every point satisfying the conditions is on the locus and every
    point on the locus satisfies the conditions.
  4. Every point not on the locus does not satisfy the conditions
    and every point not satisfying the conditions is not on the
    locus.
  5. Every point satisfying the conditions is on the locus and every
    point not satisfying the conditions is not on the locus.