यदि \(A=\{p,q,r\}\) है, तो (A-A) क्या होगा?
If \(A=\{p,q,r\}\), what will (A-A) be?
Explanation opens after your attempt
A. \( \varnothing \)
Concept
(A-A) needs elements of (A) that are not in (A), which is impossible. So \(A-A=\varnothing\).
Why this answer is correct
The correct answer is A. \( \varnothing \). (A-A) needs elements of (A) that are not in (A), which is impossible. So \(A-A=\varnothing\).
Exam Tip
(A-A) में (A) के वे अवयव चाहिए जो (A) में न हों, जो संभव नहीं है। इसलिए \(A-A=\varnothing\) है।
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