फलन (f(x)=\sqrt{15-5x}) का डोमेन क्या है?
What is the domain of (f(x)=\sqrt{15-5x})?
Explanation opens after your attempt
A. (\(-\infty,3]\)
Concept
The square root needs \(15-5x\ge0\), giving \(x\le3\). In exams the inequality reverses when dividing by a negative coefficient.
Why this answer is correct
The correct answer is A. (\(-\infty,3]\). The square root needs \(15-5x\ge0\), giving \(x\le3\). In exams the inequality reverses when dividing by a negative coefficient.
Exam Tip
वर्गमूल के लिए \(15-5x\ge0\) से \(x\le3\) मिलता है। परीक्षा में ऋणात्मक गुणांक से भाग देते समय असमानता बदलती है।
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