Question

If A={1,3,5} and B={2,3} then find

1) (A*B) and (B*A)
2) Is A*B = B*A? if not why?
3) show that n(A*B) =n(B*A) =n(A) * n(B)

NOTE: * means MULTIPLY​

Answer 1

Step-by-step explanation:

Solution

We have <br>

(i)" "AxxB={1,3,5}xx{2,3}

<br>

={(1,2),(1,3),(3,2),(3,3),(5,2),(5,3)}.

<br>

(ii)" "BxxA={2,3}xx{1,3,5}

<br>

={(2,1),(2,3),(2,5),(3,1),(3,3),(3,5)}.

<br>

(iii)" "(AxxB)nn(BxxA)={(3,3)}.

Answer 2

Answer:

3) show that hahhhababuiuu