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Question
Write the relation in the Roster Form. State its domain and range
R2 = `{("a", 1/"a") // 0 < "a" ≤ 5, "a" ∈ "N"}`
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Solution
R2 = `{("a", 1/"a") // 0 < "a" ≤ 5, "a" ∈ "N"}`
∴ R2 = `{(1, 1), (2, 1/2), (3, 1/3),(4, 1/4), (5, 1/5)}`
Domain of R2 = {a/0 < a ≤ 5, a ∈ N}
= {1, 2, 3, 4, 5}
Range of R2 = `{1/"a" // 0 < "a" ≤ 5, "a" ∈ N}`
= `{1, 1/2, 1/3, 1/4, 1/5}`
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