कौन-सा relation \(A=\{1,2,3,4\}\) से \(B=\{1,2,3,4\}\) में identity function है?
Which relation is the identity function from \(A=\{1,2,3,4\}\) to \(B=\{1,2,3,4\}\)?
Explanation opens after your attempt
A. \(R=\{(1,1),(2,2),(3,3),(4,4)\}\)
Concept
In an identity function, every \(x\in A\) maps to the same (x). Identify it by (I_A(x)=x).
Why this answer is correct
The correct answer is A. \(R=\{(1,1),(2,2),(3,3),(4,4)\}\). In an identity function, every \(x\in A\) maps to the same (x). Identify it by (I_A(x)=x).
Exam Tip
identity function में हर \(x\in A\) की image वही (x) होती है। इसे (I_A(x)=x) से पहचानें।
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