# 2. Let $A=\{1,2,3\}$ and $B=\{x \mid x$ is a prime number less than 10$\}$. Find $A \times B$ and 3. If $B \times A=\{(-2,3),(-2,4),(0,3),(0,4),(3,3),(3,4)\}$ find $A$ and $B$. 4. If $A=\{5.6\}$

67 views
2. Let $A=\{1,2,3\}$ and $B=\{x \mid x$ is a prime number less than 10$\}$. Find $A \times B$ and 3. If $B \times A=\{(-2,3),(-2,4),(0,3),(0,4),(3,3),(3,4)\}$ find $A$ and $B$. 4. If $A=\{5.6\}$

+1 vote
by (43.0k points)

We have

B X A = {(-2, 3), (-2, 4), (0, 3), (0, 4), (3, 3), (3, 4)}

Since, First element of each ordered pair is a member of set B and second element of each ordered pair is a member of set A.

$\therefore$ B = {-2, 0, 3} and A = {3, 4}

+1 vote