यदि \(A={x\in \mathbb{Z}:x\) तीन से विभाज्य है और \(x^2<30}\) है, तो (A) में कितने अवयव हैं?
If \(A={x\in \mathbb{Z}:x\) is divisible by (3) and \(x^2<30}\), how many elements are in (A)?
Explanation opens after your attempt
A. (3)
Concept
\(x^2<30\) से संभावित पूर्णांक (-5) से (5) तक हैं। / From \(x^2<30\), the possible integers run from (-5) to (5).
Why this answer is correct
इनमें (3) से विभाज्य पूर्णांक (-3,0,3) हैं। / The integers divisible by (3) among them are (-3,0,3).
Exam Tip
विभाज्यता के प्रश्न में (0) को भी जाँचें। / In divisibility questions, remember to check (0) too.
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