यदि \(a=\sqrt{7}+\sqrt{3}\) और \(b=\sqrt{7}-\sqrt{3}\) हैं, तो (ab) और (a+b) का सही युग्म कौन-सा है?

If \(a=\sqrt{7}+\sqrt{3}\) and \(b=\sqrt{7}-\sqrt{3}\), which is the correct pair of (ab) and (a+b)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

A. (4), \(2\sqrt{7}\)

Step 1

Concept

(ab=7-3=4) and \(a+b=2\sqrt{7}\). In conjugates check product and sum separately.

Step 2

Why this answer is correct

The correct answer is A. (4), \(2\sqrt{7}\). (ab=7-3=4) and \(a+b=2\sqrt{7}\). In conjugates check product and sum separately.

Step 3

Exam Tip

(ab=7-3=4) और \(a+b=2\sqrt{7}\) है। संयुग्मी में गुणन और योग अलग-अलग देखें।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a=\sqrt{7}+\sqrt{3}\) और \(b=\sqrt{7}-\sqrt{3}\) हैं, तो (ab) और (a+b) का सही युग्म कौन-सा है? / If \(a=\sqrt{7}+\sqrt{3}\) and \(b=\sqrt{7}-\sqrt{3}\), which is the correct pair of (ab) and (a+b)?

Correct Answer: A. (4), \(2\sqrt{7}\). Explanation: (ab=7-3=4) और \(a+b=2\sqrt{7}\) है। संयुग्मी में गुणन और योग अलग-अलग देखें। / (ab=7-3=4) and \(a+b=2\sqrt{7}\). In conjugates check product and sum separately.

Which concept should I revise for this Mathematics MCQ?

(ab=7-3=4) and \(a+b=2\sqrt{7}\). In conjugates check product and sum separately.

What exam hint can help solve this Mathematics question?

(ab=7-3=4) और \(a+b=2\sqrt{7}\) है। संयुग्मी में गुणन और योग अलग-अलग देखें।