JEE MATHEMATICS MCQ: FUNCTIONS

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Understanding +4 | -1

Let

A=\{1,2,3,4\}

B=\{1,5,9,11,15,16\}

and

f=\{(1,5),(2,9),(3,1)

(4,5),(2,11)\}

, then

View answer and explanation

Correct option: A

f

is a relation from

A

B

Option A (

f

is a relation from

A

B

) is correct because all first elements of the ordered pairs in

f

belong to

A

, and all second elements belong to

B

, satisfying the definition of a relation from

A

B

. However, the element 2 in A maps to two different elements in B (9 and 11), so it's not a function.

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