Question: Find a counterexample, if possible, to these universally quantified statements, where the domain for all variables consists of all integers. a) xy(x2 = y2

Find a counterexample, if possible, to these universally quantified statements, where the domain for all variables consists of all integers.
a) ∀x∀y(x2 = y2 → x = y)
b) ∀x∃y(y2 = x)
c) ∀x∀y(xy ≥ x)

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