\(\frac{2}{\sqrt{7}+\sqrt{5}}\) का परिमेयकृत रूप क्या है?
What is the rationalised form of \(\frac{2}{\sqrt{7}+\sqrt{5}}\)?
Explanation opens after your attempt
Correct Answer
A. \(\sqrt{7}-\sqrt{5}\)
Concept
Multiplying by the conjugate makes the denominator (7-5=2). So (\frac{2\(\sqrt{7}-\sqrt{5}\)}{2}=\sqrt{7}-\sqrt{5}).
Why this answer is correct
The correct answer is A. \(\sqrt{7}-\sqrt{5}\). Multiplying by the conjugate makes the denominator (7-5=2). So (\frac{2\(\sqrt{7}-\sqrt{5}\)}{2}=\sqrt{7}-\sqrt{5}).
Exam Tip
संयुग्मी से गुणा करने पर हर (7-5=2) बनता है। इसलिए (\frac{2\(\sqrt{7}-\sqrt{5}\)}{2}=\sqrt{7}-\sqrt{5}) है।
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