Sarthaks Test
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If R3 = {(x, x ) | x is a real number} is a relation. Then find domain and range of R3.

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We have, R3 = {(x, |x)) | x is real number}

Clearly, domain of R3 = R

Now, x ∈ R and |x| ≥ 0 .

Range of R3 is [0,∞)

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