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Question
If A = {2, 3, 4, 5, 6, 7, 8}, determine the truth value of the following statement.
∃ x ∈ A, such that x + 3 < 11.
Solution
For x = 2, x + 3 = 2 + 3 = 5 < 11.
∴ x = 2 satisfies the equation x + 3 < 11.
∴ The given statement is true.
∴ Its truth value is T.
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