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If A = {0, 1, 2}, B = {1, 2, 3, 4}, and f(x) = x + 2, which ordered pair does not belong to f?

Answer and explanation

Correct answer: (2, 3)

The governing idea is that an ordered pair (x,y) belongs to the function precisely when y=f(x). The domain is A={0,1,2}, and the rule is f(x)=x+2. Substitution gives f(0)=0+2=2, f(1)=1+2=3, and f(2)=2+2=4. Thus the function contains exactly the pairs (0,2), (1,3), and (2,4). The proposed pair (2,3) does not belong because applying the rule to x=2 produces 4, not 3. Options A, B, and C each satisfy y=x+2 and are therefore valid members. Hence option D is correct. The codomain includes all these outputs, so no additional restriction changes the result.

Related tags

Relations-FunctionsOrdered-PairsFunction-RuleFunctions As A Special Kind Of RelationRelations And FunctionsMathematicsClass 11 Mcq

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