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Which statement is correct for (f(x)=\sqrt{x^2+9})?कौन सा कथन फलन (f(x)=\sqrt{x^2+9}) के लिए सही है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: Domain (\mathbb{R}) and range ([3,\infty))डोमेन (\mathbb{R}) और रेंज ([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.(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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