यदि \(A=\{2,3,4\}\) और \(B=\{7,8\}\) हैं, तो \(A\times B\) में (2) को पहले घटक के रूप में लेकर कौन से युग्म होंगे?
If \(A=\{2,3,4\}\) and \(B=\{7,8\}\), which pairs in \(A\times B\) have (2) as the first component?
Explanation opens after your attempt
Correct Answer
A. ({(2,7),(2,8)})
Concept
The first component (2) is fixed and the second component is (7) or (8) from (B). With a fixed first component, all elements of the second set are used.
Why this answer is correct
The correct answer is A. ({(2,7),(2,8)}). The first component (2) is fixed and the second component is (7) or (8) from (B). With a fixed first component, all elements of the second set are used.
Exam Tip
पहला घटक (2) निश्चित है और दूसरा घटक (B) से (7) या (8) होगा। निश्चित पहले घटक के साथ दूसरे समुच्चय के सभी तत्व लगते हैं।
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