यदि \(f:A\to B\) और \(g:B\to C\) दोनों एक-एकी हैं, तो \(g\circ f\) कैसा होगा?
If \(f:A\to B\) and \(g:B\to C\) are both one-one, what can be said about \(g\circ f\)?
Explanation opens after your attempt
A. एक-एकीOne-one
Concept
Suppose (\(g\circ f\)\(a_1\)=\(g\circ f\)\(a_2\)).
Why this answer is correct
Since (g) is one-one, (f\(a_1\)=f\(a_2\)).
Exam Tip
Since (f) is one-one, \(a_1=a_2\), so the composite is one-one. चरण 1: मान लें (\(g\circ f\)\(a_1\)=\(g\circ f\)\(a_2\))। चरण 2: (g) एक-एकी है, इसलिए (f\(a_1\)=f\(a_2\))। चरण 3: (f) एक-एकी है, इसलिए \(a_1=a_2\), अतः संयुक्त फलन एक-एकी है।
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