यदि \(A=\{1,2,3\}\) और \(B=\{4,5\}\) हैं, तो \(A\times B\) में पहले घटकों का समुच्चय क्या होगा?
If \(A=\{1,2,3\}\) and \(B=\{4,5\}\), what is the set of first components in \(A\times B\)?
Explanation opens after your attempt
Correct Answer
A. ({1,2,3})
Concept
In \(A\times B\), all first components come from (A), and (B) is non-empty. Therefore the set of first components is (A).
Why this answer is correct
The correct answer is A. ({1,2,3}). In \(A\times B\), all first components come from (A), and (B) is non-empty. Therefore the set of first components is (A).
Exam Tip
\(A\times B\) में सभी पहले घटक (A) से आते हैं और (B) रिक्त नहीं है। इसलिए पहले घटकों का समुच्चय (A) ही है।
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