Let $R$ be a relation from $N$ to $N$ defined by $R =\left\{(a, b): a, b \in N \text { and } a=b^{2}\right\} .$ Are the following true?
$(a, a) \in R ,$ for all $a \in N$
Let $R$ be a relation from $N$ to $N$ defined by $R =\left\{(a, b): a, b \in N \text { and } a=b^{2}\right\} .$ Are the following true?
$(a, a) \in R ,$ for all $a \in N$
$R=\left\{(a, b): a, b \in N \text { and } a=b^{2}\right\}$
It can be seen that $2 \in N$; however, $2 \neq 2^{2}=4$
Therefore, the statement $''(a, a) \in R,$ for all $a \in N ^{\prime \prime}$ is not true.
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