कौन सा कथन फलन (f(x)=\sqrt{x-2+9}) के लिए सही है?
Which statement is correct for (f(x)=\sqrt{x-2+9})?
Explanation opens after your attempt
Correct Answer
A. डोमेन \(\mathbb{R}\) और रेंज \([3,\infty\))Domain \(\mathbb{R}\) and range \([3,\infty\))
Concept
Since \(x^2+9\ge 9\), the square root is at least (3) and the domain is all real numbers. In exams check the minimum value inside.
Why this answer is correct
The correct answer is A. डोमेन \(\mathbb{R}\) और रेंज \([3,\infty\)) / Domain \(\mathbb{R}\) and range \([3,\infty\)). Since \(x^2+9\ge 9\), the square root is at least (3) and the domain is all real numbers. In exams check the minimum value inside.
Exam Tip
\(x^2+9\ge 9\), इसलिए वर्गमूल कम से कम (3) है और डोमेन सभी वास्तविक है। परीक्षा में अंदर की न्यूनतम वैल्यू देखें।
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