" 11.If "A sube B" ,show that "A times A sube(A times B)nn(B times A)" ."

If A sube B, show that A xxbar(A)sube(A xx B)nn(B xx A)

Theorem 4( If A sube B; show that A xx A sube(A xxbar(B))nn(B xx A))

If A sube B , prove that AxxA sube (A xxB) nn (BxxA) .

(i) If A sube B , prove that A xx A sube (A xx B) nn (B xx A) (ii) If A sube B , prove that A xx C sube B xx C for any set C.

If A sube B, then B uu A is equal to

Show that If A sube B then A nn B=A

If A sube B then A uu B=B

If sube B, then A\B is