यदि \(A={x:x\in Z\) और \(x^2=1}\) तथा \(B=\{-1,1\}\) है तो क्या सत्य है?
If \(A={x:x\in Z\) and \(x^2=1}\) and \(B=\{-1,1\}\) then what is true?
Explanation opens after your attempt
Correct Answer
A. (A=B)
Concept
The integer solutions are both (-1) and (1), so (A) and (B) are equal. In exams check both signs in square conditions.
Why this answer is correct
The correct answer is A. (A=B). The integer solutions are both (-1) and (1), so (A) and (B) are equal. In exams check both signs in square conditions.
Exam Tip
पूर्णांक हल (-1) और (1) दोनों हैं इसलिए (A) और (B) बराबर हैं। परीक्षा में वर्ग की शर्त में दोनों चिन्ह देखें।
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