Aspire Faculty ID #10426 · Topic: NIMCET 2013 · Just now
NIMCET 2013

A tautology is a Boolean formula that is always true. Which of the following is a tautology?

Solution

$x+\overline{y}+\overline{x}$
=$\bar{y}+x+\bar{x}$
=$\bar{y}+1$
=$1$

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