Question

Find the Union of X={ x:n E N,x =2n, n<4} , Y={X:X is an even number less than 10}

Answer 1

X={2,4,6}
Y={2,4,6,8}
answer ={2,4,6,8}

Answer 2

X={2*1,2*2,2*3}={2,4,6}
Y={2,4,6,8}
XUY={2,4,6}U{2,4,6,8}
={2,4,6,8}
=Y