alleryThe Cartesian product A × A has 9 elements, two of which are (-1, 0) and (0, 1). The set A is:
A{-1, 0}
B{-1, 0, 1}
C{-1, 1}
D{0, 1}
Answer & Solution
Correct answer: B. {-1, 0, 1}
|A × A| = 9 → |A| = 3. Since (-1, 0) and (0, 1) are in A × A, both -1, 0 and 1 are in A. So A = {-1, 0, 1}.
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