Why not learn to post in LaTeX?
It almost as easy as equation editor.
[tex](a,b)\in A\times B[/tex] gives .
You work is correct.
Good day to all
I have attached the question asked and my work for better legibility. I need to prove that the LHS is a proper subset of the RHS. I have (I believe) managed to proved that it is a subset of the RHS but not a proper subset. I know that to do so, I would need to prove that the LHS subset of RHS and LHS different than RHS. This is where my problem arises. Any help would be greatly appreciated.