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
Correct Answer

A. (\(-\infty,3]\)

Step 1

Concept

The square root needs \(15-5x\ge0\), giving \(x\le3\). In exams the inequality reverses when dividing by a negative coefficient.

Step 2

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.

Step 3

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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Mathematics Answer, Explanation and Revision Hints

फलन (f(x)=\sqrt{15-5x}) का डोमेन क्या है? / What is the domain of (f(x)=\sqrt{15-5x})?

Correct Answer: A. (\(-\infty,3]\). Explanation: वर्गमूल के लिए \(15-5x\ge0\) से \(x\le3\) मिलता है। परीक्षा में ऋणात्मक गुणांक से भाग देते समय असमानता बदलती है। / The square root needs \(15-5x\ge0\), giving \(x\le3\). In exams the inequality reverses when dividing by a negative coefficient.

Which concept should I revise for this Mathematics MCQ?

The square root needs \(15-5x\ge0\), giving \(x\le3\). In exams the inequality reverses when dividing by a negative coefficient.

What exam hint can help solve this Mathematics question?

वर्गमूल के लिए \(15-5x\ge0\) से \(x\le3\) मिलता है। परीक्षा में ऋणात्मक गुणांक से भाग देते समय असमानता बदलती है।