Question

Perform the given set operation. Let
U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}.
(Enter your answers as a comma-separated list. Enter EMPTY for the empty set.)
{x | x is a multiple of 2} union {x is a multiple of 3}

Answer 1

what's the problem? just list the elements which satisfy the conditions

{x| x∊{2,4,6,8,10}∪{3,6,9}}

now remove duplicates

{2,3,4,6,8,9,10}