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If A= {2,3,4,5}, then which of the follo...

If `A= {2,3,4,5}`, then which of the following relations is a function from A to itself

A

`f_{1}={(x,y): y=x+1}`

B

`f_{2}= {(x,y): x+Y gt 6}

C

`f_{3}={(x,y): x gt y}`

D

`f_{4}={(x,y): x+y=7}`

Text Solution

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The correct Answer is:
D
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