यदि \(A={x:x\in\mathbb{R},;x^2-9=0}\) और \(B={x:x\in\mathbb{R},;x^2-6x+9=0}\), तो \(A\cup B\) क्या है?
If \(A={x:x\in\mathbb{R},;x^2-9=0}\) and \(B={x:x\in\mathbb{R},;x^2-6x+9=0}\), what is \(A\cup B\)?
Explanation opens after your attempt
Correct Answer
A. ({-3,3})
Concept
First \(A=\{-3,3\}\) and \(B=\{3\}\). The union removes repetition and gives ({-3,3}).
Why this answer is correct
The correct answer is A. ({-3,3}). First \(A=\{-3,3\}\) and \(B=\{3\}\). The union removes repetition and gives ({-3,3}).
Exam Tip
पहले \(A=\{-3,3\}\) और \(B=\{3\}\) है। संघ में दोहराव हटाकर ({-3,3}) मिलता है।
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