List the elements of the function F = {(x,y) | 2x + y = 7} if x {positive integers less than 4} and y {positive integers less than 8}.
{( ), ( ), ( )}
(Remember to include commas)

Question

List the elements of the function F = {(x,y) | 2x + y = 7} if x  {positive integers less than 4} and y  {positive integers less than 8}.
{(               ), (             ), (             )}
(Remember to include commas)

anonymous · Answer

$x$ a positive integer less than 4, can only be 1, 2, 3 right?

anonymous · Answer

if $x=1$ we get $2\times 1+y=7\implies 2+y=7 \implies y=5$ so one pair is $(1,5)$
try it with $x=2$ and see what you get for $y$