Question

A relation R is defined from {2, 3, 4, 5} to {3, 6, 7, 10} by $x R y \Leftrightarrow x$ is relatively prime to y. Then domain of R is

• A. {2, 3, 5}
• B. {3, 5}
• C. {2, 3, 4}
• D. {2, 3, 4, 5}

Answer 1

Answer: (D)

{2, 3, 4, 5}

Answer 2

Given, $x R y \Rightarrow x$is relatively prime to y.

∴ Domain of $R = \{ 2,3,4,5 \}$.