\(\frac{4}{\sqrt{5}+1}\) का परिमेयकृत रूप कौन-सा है?
Which is the rationalised form of \(\frac{4}{\sqrt{5}+1}\)?
Explanation opens after your attempt
B. \(\sqrt{5}-1\)
Concept
Multiplying by the conjugate gives (\frac{4\(\sqrt{5}-1\)}{5-1}=\sqrt{5}-1). Make the denominator rational.
Why this answer is correct
The correct answer is B. \(\sqrt{5}-1\). Multiplying by the conjugate gives (\frac{4\(\sqrt{5}-1\)}{5-1}=\sqrt{5}-1). Make the denominator rational.
Exam Tip
संयुग्मी से गुणा करने पर (\frac{4\(\sqrt{5}-1\)}{5-1}=\sqrt{5}-1) मिलता है। हर को परिमेय बनाएं।
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