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**Introduction of Relation**

**What is ordered pairs and Equality of ordered pairs**

**What is Cartesian product of 2 sets ? (explain with example)**

**What is Cartesian product of 3 sets ?(explain with example)**

**Number of elements in cartesian product of sets Theorem (If A and B are two finite sets then ;`(n(AxxB))=n(A)xxn(B)`**

**Graphical representation of cartesian product**

**Diagramatic representation of cartesian product**

**Theorem 1(i) (For any three set `A;B;C`; prove that `Axx(BuuC)=(AxxB)uu(AxxC))`**

**Theorem 1(ii) (For any three set `A;B;C` ; prove that `Axx(BnnC)=(AxxB)nn(AxxC)`**

**Theorem 2 (For any three set `A;B;C`; prove that `Axx(B-C)=(AxxB)-(AxxC)`**