Write the relation $r = {(x, x^{3}) : x$ is a prime number less than 10} in roster form.

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Solution

Here $R = {(x, x^{3}) : x$ is a prime number less than 10}

Putting x = 2, 3, 5, 7, we get

R = {(2, 8), (3, 27), (5, 125), (7, 343)}

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