Exercise · ZW-PREDICATE-005 · ★☆☆ Basic
Which example depends on the value of x?
Choose one option.
Show answer
- B. P(x): x > 0
Explanation
\(P(x): x > 0\) changes with the value of \(x\): it is true for \(x=1\) and false for \(x=-1\). The others are fixed propositions.
Review the concept: Predicate
A predicate \(P(x)\) is an expression with free variables that becomes a proposition when values are assigned to them.
\[P(x,y)\in\{\top,\bot\}\]
More practice problems: predicate
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- ZW-PREDICATE-008 Which one is an instance of the predicate P(x): x>0?
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