यदि (f(x)=2\sqrt{x}), तो इसका वास्तविक प्रांत क्या है?
If (f(x)=2\sqrt{x}), what is its real domain?
Explanation opens after your attempt
A. \([0,\infty\))
Concept
For \(\sqrt{x}\) to be real, \(x \ge 0\) is needed. Multiplication by (2) does not change the domain.
Why this answer is correct
The correct answer is A. \([0,\infty\)). For \(\sqrt{x}\) to be real, \(x \ge 0\) is needed. Multiplication by (2) does not change the domain.
Exam Tip
\(\sqrt{x}\) वास्तविक होने के लिए \(x \ge 0\) चाहिए। (2) से गुणा करने पर प्रांत नहीं बदलता।
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