NDA 2021 Mathematics question
Consider the following statements in respect of relations and functions : 1. All relations are functions but all functions are not relations. 2. A relation from to is a subset of Cartesian product . 3. A relation in is a subset of Cartesian product . Which of the above statements are correct?
Answer: (B)
Solution
Statement 1 is reversed: every function is a relation (a special one in which each element of the domain has exactly one image), but not every relation is a function. So statement 1 is not correct. Statement 2: by
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