Question

Y={1,2,3,4} find R (x,y) E R if x+y <5; x,y E R

Answer 1

Answer:

Y={1,2,3,4}

R(x,y)E Rif x+y<5;x,y E R

R={(1,1),(1,2),(1,3),(2,1),(2,2),(3,1)}