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2.Relations and Functions
easy
मान लीजिए कि $A$ और $B$ दो समुच्चय हैं, जहाँ $n( A )=3$ और $n( B )=2 .$ यदि $(x, 1),$ $(y, 2),(z, 1), A \times B$ में हैं, तो $A$ और $B ,$ को ज्ञात कीजिए, जहाँ $x, y$ और $=$ भिन्न-भिन्न अवयव हैं।
A
$\{ x,y,z\} $ and $\{ 1,2\} $
B
$\{ x,y,z\} $ and $\{ 1,2\} $
C
$\{ x,y,z\} $ and $\{ 1,2\} $
D
$\{ x,y,z\} $ and $\{ 1,2\} $
Solution
It is given that $n(A)=3$ and $n(B)=2 ;$ and $(x, 1),(y, 2),(z, 1)$ are in $A \times B$
We know that
$A=$ Set of first elements of the ordered pair elements of $A \times B$
$B =$ Set of second elements of the ordered pair elements of $A \times B$
$\therefore x, y,$ and $z$ are the elements of $A ;$ and $1$ and $2$ are the elements of $B$
Since $n(A)=3$ and $n(B)=2$
It is clear that $A=\{x, y, z\}$ and $B=\{1,2\}$
Standard 11
Mathematics
