\( \frac{2}{\sqrt{7}-\sqrt{5}} \) का परिमेय हर वाला रूप क्या है?
What is the rationalised form of \( \frac{2}{\sqrt{7}-\sqrt{5}} \)?
Explanation opens after your attempt
A. \( \sqrt{7}+\sqrt{5} \)
Concept
Multiplying by the conjugate \( \sqrt{7}+\sqrt{5} \) gives denominator (7-5=2). The numerator also has (2), so the answer is \( \sqrt{7}+\sqrt{5} \).
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 \( \sqrt{7}+\sqrt{5} \).
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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