यदि \(U={x:x\in\mathbb{N},x\le 84}\), \(A={x:x\in U,6\mid x}\) और \(B={x:x\in U,14\mid x}\), तो (n\(A'\cap B'\)) क्या है?
If \(U={x:x\in\mathbb{N},x\le 84}\), \(A={x:x\in U,6\mid x}\), and \(B={x:x\in U,14\mid x}\), what is (n\(A'\cap B'\))?
Explanation opens after your attempt
A. (66)
Concept
By De Morgan's law, (A'\cap B'=\(A\cup B\)'). Since (n\(A\cup B\)=14+6-2=18), (n\(A'\cap B'\)=84-18=66).
Why this answer is correct
The correct answer is A. (66). By De Morgan's law, (A'\cap B'=\(A\cup B\)'). Since (n\(A\cup B\)=14+6-2=18), (n\(A'\cap B'\)=84-18=66).
Exam Tip
डी मॉर्गन से (A'\cap B'=\(A\cup B\)') है। (n\(A\cup B\)=14+6-2=18), इसलिए (n\(A'\cap B'\)=84-18=66) है।
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