यदि \(A={x\in \mathbb{Z}:x^2=25}\), \(B=\{5,-5\}\) और \(C=\{-5,5,5\}\) हैं, तो सही कथन क्या है?
If \(A={x\in \mathbb{Z}:x^2=25}\), \(B=\{5,-5\}\), and \(C=\{-5,5,5\}\), what is the correct statement?
Correct answer and explanation
A. (A=B=C)
Concept
\(x^2=25\) के पूर्णांक हल (5) और (-5) हैं। / The integer solutions of \(x^2=25\) are (5) and (-5).
Why this answer is correct
(C) में (5) का दोहराव समुच्चय को नहीं बदलता। / The repetition of (5) in (C) does not change the set.
Exam Tip
बराबरी जाँचते समय सभी भिन्न अवयवों की तुलना करें। / Compare distinct elements when checking equality.
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