\(\frac{12}{\sqrt{43}-\sqrt{31}}\) का परिमेयकृत रूप कौन-सा है?
Which is the rationalised form of \(\frac{12}{\sqrt{43}-\sqrt{31}}\)?
Explanation opens after your attempt
Correct Answer
C. \(\sqrt{43}+\sqrt{31}\)
Concept
Multiplying by the conjugate makes the denominator (43-31=12). So the answer is \(\sqrt{43}+\sqrt{31}\).
Why this answer is correct
The correct answer is C. \(\sqrt{43}+\sqrt{31}\). Multiplying by the conjugate makes the denominator (43-31=12). So the answer is \(\sqrt{43}+\sqrt{31}\).
Exam Tip
संयुग्मी से गुणा करने पर हर (43-31=12) बनता है। इसलिए उत्तर \(\sqrt{43}+\sqrt{31}\) है।
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