Let A = {1, 2, 3} and B = {2, 3, 4}, then which of the following relations is a function from A to B?

Question

Smart Achievers · Accepted Answer

(3)

A relation is a function from set A to set B, if every element in A maps to one and only one element of B. So, relation {(1, 3), (2, 3), (3, 3)} is a function from A to B.

Solution

Q.
Let A = {1, 2, 3} and B = {2, 3, 4}, then which of the following relations is a function from A to B

1 {(1, 2), (2, 3), (3, 4), (2, 2)}

2 {(1, 2), (2, 3), (1, 3)}

3 {(1, 3), (2, 3), (3, 3)}

4 {(1, 1), (2, 3), (3, 4)}

Ans.
(3)

A relation is a function from set A to set B, if every element in A maps to one and only one element of B. So, relation {(1, 3), (2, 3), (3, 3)} is a function from A to B.

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