Algebra and Trigonometry Quiz
What is the contraposition of the following proposition? For all x ∈ Z, x² − 1 = 0 only if (x = −1 or x = 1)
A. For all x ∈ Z, x² = 0 only if (x ≠ −1 and x ≠ 1)
B. For all x ∈ Z, (x ≠ −1 and x ≠ 1) only if x² − 1 ≠ 0
C. There exist x ∈ Z, x² − 1 ≠ 0 or (x ≠ −1 and
Khalifa
Created at 5/6/2025 4:56:20 PM
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