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प्रश्न
Is the following relation a function? Justify your answer
R2 = {(x, |x |) | x is a real number}
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उत्तर
R2 = {(x, |x |) / x ∈R}
For every x ∈ R there will be unique image as |x | ∈ R.
Therefore R2 is a function.
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