\(\frac{7}{\sqrt{30}-\sqrt{23}}\) का परिमेयकृत रूप कौन-सा है?
Which is the rationalised form of \(\frac{7}{\sqrt{30}-\sqrt{23}}\)?
Explanation opens after your attempt
C. \(\sqrt{30}+\sqrt{23}\)
Concept
Multiplying by the conjugate makes the denominator (30-23=7). So the answer is \(\sqrt{30}+\sqrt{23}\).
Why this answer is correct
The correct answer is C. \(\sqrt{30}+\sqrt{23}\). Multiplying by the conjugate makes the denominator (30-23=7). So the answer is \(\sqrt{30}+\sqrt{23}\).
Exam Tip
संयुग्मी से गुणा करने पर हर (30-23=7) बनता है। इसलिए उत्तर \(\sqrt{30}+\sqrt{23}\) है।
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