Question

let A={−1, −2,3,4} and B={−1, −2, −3, −4} and define relations R and S from B
to A as follow
x R y iff |𝑥| = |𝑦|
x S y iff x-y is even
state explicity which ordered pairs are in RUS and R ∩ �

Answer 1

Just list 'em ...
RUS {(-1,-1) ... (4,-4)}U{(-1,-1),(-1,-3),...,(4,-2),(4,-4)}
and eliminate the duplicates.
Now do the intersection in like wise