Question

Let $A = { 1,2,3,4}$ and $B = {2,3,4,5,6 }$ then $A \Delta B$ is equal to

• A. (2, 3, 4 }
• B. {1}
• C. {5,6}
• D. {1,5,6}

Answer 1

Answer: (D)

{1,5,6}

Answer 2

$\because \, A \Delta B = \\{ x : x \in \frac{A}{B} or x \in \frac{B}{A} \\}$