NCERT Exercise 2.3 Q1 - Relations and Functions
Question: Which relations are functions? For each function give domain and range: (i) {(2,1),(5,1),(8,1),(11,1),(14,1),(17,1)}; (ii) {(2,1),(4,2),(6,3),(8,4),(10,5),(12,6),(14,7)}; (iii) {(1,3),(1,5),(2,5)}.
Answer: (i) function: domain={2,5,8,11,14,17}, range={1}. (ii) function: domain={2,4,6,8,10,12,14}, range={1,2,3,4,5,6,7}. (iii) not a function.
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