\(\sqrt{10+\sqrt{21}}\) के बारे में कौन-सा कथन निश्चित रूप से सही है?

Which statement is definitely true about \(\sqrt{10+\sqrt{21}}\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. इसका वर्ग \(10+\sqrt{21}\) हैIts square is \(10+\sqrt{21}\)

Step 1

Concept

Since \(10+\sqrt{21}\) is positive, its square root is real. Squaring it gives the inside number.

Step 2

Why this answer is correct

The correct answer is B. इसका वर्ग \(10+\sqrt{21}\) है / Its square is \(10+\sqrt{21}\). Since \(10+\sqrt{21}\) is positive, its square root is real. Squaring it gives the inside number.

Step 3

Exam Tip

क्योंकि \(10+\sqrt{21}\) धनात्मक है, इसका वर्गमूल वास्तविक है। वर्ग करने पर अंदर की संख्या मिलती है।

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Mathematics Answer, Explanation and Revision Hints

\(\sqrt{10+\sqrt{21}}\) के बारे में कौन-सा कथन निश्चित रूप से सही है? / Which statement is definitely true about \(\sqrt{10+\sqrt{21}}\)?

Correct Answer: B. इसका वर्ग \(10+\sqrt{21}\) है / Its square is \(10+\sqrt{21}\). Explanation: क्योंकि \(10+\sqrt{21}\) धनात्मक है, इसका वर्गमूल वास्तविक है। वर्ग करने पर अंदर की संख्या मिलती है। / Since \(10+\sqrt{21}\) is positive, its square root is real. Squaring it gives the inside number.

Which concept should I revise for this Mathematics MCQ?

Since \(10+\sqrt{21}\) is positive, its square root is real. Squaring it gives the inside number.

What exam hint can help solve this Mathematics question?

क्योंकि \(10+\sqrt{21}\) धनात्मक है, इसका वर्गमूल वास्तविक है। वर्ग करने पर अंदर की संख्या मिलती है।