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MHT CET 2023 Mathematics question

MathematicsMathematical ReasoningMHT CET 2023

Not in JEE syllabus

The statement is a tautology, when r is equivalent to

Answer: (D)

Solution

First simplify the antecedent: (modus tollens). So we need to be a tautology, i.e. must be true whenever and are both false (the only case

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Question ID VK-098360