यदि \(A={X:X\subseteq{1,2,3,4},{1,4}\subseteq X\) और \(2\notin X}\) है तो (A) के बराबर कौन सा समुच्चय है?
If \(A={X:X\subseteq{1,2,3,4},{1,4}\subseteq X\) and \(2\notin X}\), which set is equal to (A)?
Explanation opens after your attempt
Correct Answer
A. ({{1,4},{1,3,4}})
Concept
Every (X) must contain (1) and (4), and must not contain (2), so only (3) is optional. In such questions, fix required and forbidden elements first.
Why this answer is correct
The correct answer is A. ({{1,4},{1,3,4}}). Every (X) must contain (1) and (4), and must not contain (2), so only (3) is optional. In such questions, fix required and forbidden elements first.
Exam Tip
हर (X) में (1) और (4) होना चाहिए तथा (2) नहीं होना चाहिए, इसलिए केवल (3) वैकल्पिक है। ऐसे प्रश्नों में अनिवार्य और निषिद्ध अवयव पहले तय करें।
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