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
Correct Answer

A. \( \varnothing \)

Step 1

Concept

(A-A) needs elements of (A) that are not in (A), which is impossible. So \(A-A=\varnothing\).

Step 2

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 \(A-A=\varnothing\).

Step 3

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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Mathematics Answer, Explanation and Revision Hints

यदि \(A=\{p,q,r\}\) है, तो (A-A) क्या होगा? / If \(A=\{p,q,r\}\), what will (A-A) be?

Correct Answer: A. \( \varnothing \). Explanation: (A-A) में (A) के वे अवयव चाहिए जो (A) में न हों, जो संभव नहीं है। इसलिए \(A-A=\varnothing\) है। / (A-A) needs elements of (A) that are not in (A), which is impossible. So \(A-A=\varnothing\).

Which concept should I revise for this Mathematics MCQ?

(A-A) needs elements of (A) that are not in (A), which is impossible. So \(A-A=\varnothing\).

What exam hint can help solve this Mathematics question?

(A-A) में (A) के वे अवयव चाहिए जो (A) में न हों, जो संभव नहीं है। इसलिए \(A-A=\varnothing\) है।