यदि \(x\in(-4,1)\) है, तो (-2x) किस अंतराल में होगा?
If \(x\in(-4,1)\), in which interval will (-2x) lie?
Explanation opens after your attempt
A. ([-2,8))
Concept
Multiplying by (-2) reverses order: \(x\le 1\) gives \(-2x\ge -2\), and (x>-4) gives (-2x<8). Thus the interval is ([-2,8)).
Why this answer is correct
The correct answer is A. ([-2,8)). Multiplying by (-2) reverses order: \(x\le 1\) gives \(-2x\ge -2\), and (x>-4) gives (-2x<8). Thus the interval is ([-2,8)).
Exam Tip
(-2) से गुणा करने पर क्रम उलटता है: \(x\le 1\) से \(-2x\ge -2\) और \(x>-4\) से \(-2x<8\)। इसलिए अंतराल \([-2,8]\) है।
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