If `A sub B`, then prove that `C-B sube C-A`.

If A sub B , prove that B'sub A '.

If A sube B and C sube D , then prove that: A xx C sube B xx D

If A sube B and C sube D , then prove that: A xx C sube B xx D

If A sube B, prove that A xx C sube B xx C for any set C.

If A sube B , prove that AxxC sube BxxC for any set C.

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

sube B, then prove that AxxA sube (AxxB) nn (BxxA).

If A sube B then prove that (A xx B)nn(B xx A)=A^(2)

If A sube B and C be any set , then prove that: A xx C sube B xx C