1.

`f:{1,2,3}rarr{4,5}` is not a functio if it is defined by which one of the following?A. {(2,4),(3,5),(1,5)}B. {(1,4),(2,4),(3,4)}C. {(1,4),(2,5),(3,4)}D. {(1,4),(1,5),(2,4),(2,5),(3,4),(3,5)}

Answer» Correct Answer - D
If the relation is defined by option (d), then each 1, 2 and 3 has two images. So, it is not a function.


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