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in Sets, Relations and Functions by (28.3k points)
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Write the relation R = {(x, x3) : x is a prime number less than 10} in roster form.

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Best answer

Given,

R = {(x, x3) : x is a prime number less than 10} 

Prime numbers less than 10 are 2, 3, 5 and 7 

∴ R = {(2, 23), (3, 33), (5, 53), (7, 73)} 

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

So, 

Domain of relation R = {2, 3, 5, 7} 

Range of relation R = {8, 27, 125, 343}

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