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
Correct Answer

A. \([0,\infty\))

Step 1

Concept

For \(\sqrt{x}\) to be real, \(x \ge 0\) is needed. Multiplication by (2) does not change the domain.

Step 2

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.

Step 3

Exam Tip

\(\sqrt{x}\) वास्तविक होने के लिए \(x \ge 0\) चाहिए। (2) से गुणा करने पर प्रांत नहीं बदलता।

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Mathematics Answer, Explanation and Revision Hints

यदि (f(x)=2\sqrt{x}), तो इसका वास्तविक प्रांत क्या है? / If (f(x)=2\sqrt{x}), what is its real domain?

Correct Answer: A. \([0,\infty\)). Explanation: \(\sqrt{x}\) वास्तविक होने के लिए \(x \ge 0\) चाहिए। (2) से गुणा करने पर प्रांत नहीं बदलता। / For \(\sqrt{x}\) to be real, \(x \ge 0\) is needed. Multiplication by (2) does not change the domain.

Which concept should I revise for this Mathematics MCQ?

For \(\sqrt{x}\) to be real, \(x \ge 0\) is needed. Multiplication by (2) does not change the domain.

What exam hint can help solve this Mathematics question?

\(\sqrt{x}\) वास्तविक होने के लिए \(x \ge 0\) चाहिए। (2) से गुणा करने पर प्रांत नहीं बदलता।