\( \frac{2}{\sqrt{7}-\sqrt{5}} \) का परिमेय हर वाला रूप क्या है?

What is the rationalised form of \( \frac{2}{\sqrt{7}-\sqrt{5}} \)?

Author: Muft Shiksha Editorial Team Published:
Explanation opens after your attempt
Correct Answer

A. \( \sqrt{7}+\sqrt{5} \)

Step 1

Concept

Multiplying by the conjugate \( \sqrt{7}+\sqrt{5} \) gives denominator (7-5=2). The numerator also has (2), so the answer is \( \sqrt{7}+\sqrt{5} \).

Step 2

Why this answer is correct

The correct answer is A. \( \sqrt{7}+\sqrt{5} \). Multiplying by the conjugate \( \sqrt{7}+\sqrt{5} \) gives denominator (7-5=2). The numerator also has (2), so the answer is \( \sqrt{7}+\sqrt{5} \).

Step 3

Exam Tip

संयुग्मी \( \sqrt{7}+\sqrt{5} \) से गुणा करने पर हर (7-5=2) आता है। अंश में भी (2) है इसलिए उत्तर \( \sqrt{7}+\sqrt{5} \) है।

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FAQs

Mathematics Answer, Explanation and Revision Hints

\( \frac{2}{\sqrt{7}-\sqrt{5}} \) का परिमेय हर वाला रूप क्या है? / What is the rationalised form of \( \frac{2}{\sqrt{7}-\sqrt{5}} \)?

Correct Answer: A. \( \sqrt{7}+\sqrt{5} \). Explanation: संयुग्मी \( \sqrt{7}+\sqrt{5} \) से गुणा करने पर हर (7-5=2) आता है। अंश में भी (2) है इसलिए उत्तर \( \sqrt{7}+\sqrt{5} \) है। / Multiplying by the conjugate \( \sqrt{7}+\sqrt{5} \) gives denominator (7-5=2). The numerator also has (2), so the answer is \( \sqrt{7}+\sqrt{5} \).

Which concept should I revise for this Mathematics MCQ?

Multiplying by the conjugate \( \sqrt{7}+\sqrt{5} \) gives denominator (7-5=2). The numerator also has (2), so the answer is \( \sqrt{7}+\sqrt{5} \).

What exam hint can help solve this Mathematics question?

संयुग्मी \( \sqrt{7}+\sqrt{5} \) से गुणा करने पर हर (7-5=2) आता है। अंश में भी (2) है इसलिए उत्तर \( \sqrt{7}+\sqrt{5} \) है।