Question

Let A = {x | x < 5} and B = {x | x ≤ 7}.
Find A B.
{x | x < 5}
{x | x ≤ 5}
{x | x ≤ 7}
{x | 5 < x ≤ 7}

Answer 1

again we are missing something
is it
\[A\cup B\] or
\[A\cap B\]?

Answer 2

top one

Answer 3

ok top one means one or the other or both so take all that apply

Answer 4

in other words take the largest set, namely
\[\{x|x\leq 7\}\]