Determine the truth value of each of these statements if the domain of each variable consists of all real numbers. a) ∃x(x2 = −1) b) ∀x(x2 + 2 ≥ 1)
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a) according to statement: for . As we know, for . So, it means, that statement (a) is false.
b) according to statement: for . As we know, for
That means statement (b) is true.