\(यदि (A={x\in\mathbb{N}:x\) अभाज्य है और \(x\mid 84}), तो (A) किसके बराबर है\)?
\(If (A={x\in\mathbb{N}:x\) is prime and \(x\mid 84}), what is (A) equal to\)?
Explanation opens after your attempt
Correct Answer
A. ({2,3,7})
Concept
\(84=2^2\cdot 3\cdot 7\).
Why this answer is correct
Its prime factors are (2,3,7), so \(A=\{2,3,7\}\).
Exam Tip
Do not include (1) or composite factors as prime factors. चरण 1: \(84=2^2\cdot 3\cdot 7\) है। चरण 2: इसके अभाज्य गुणनखंड (2,3,7) हैं, इसलिए \(A=\{2,3,7\}\)। चरण 3: (1) और भाज्य गुणनखंडों को अभाज्य गुणनखंड में शामिल न करें।
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