यदि \(x=4-\sqrt{15}\), तो \(\frac{1}{x}\) किसके बराबर है?
If \(x=4-\sqrt{15}\), then \(\frac{1}{x}\) is equal to which expression?
Explanation opens after your attempt
A. \(4+\sqrt{15}\)
Concept
(\(4-\sqrt{15}\)\(4+\sqrt{15}\)=1). Therefore the reciprocal is \(4+\sqrt{15}\).
Why this answer is correct
The correct answer is A. \(4+\sqrt{15}\). (\(4-\sqrt{15}\)\(4+\sqrt{15}\)=1). Therefore the reciprocal is \(4+\sqrt{15}\).
Exam Tip
(\(4-\sqrt{15}\)\(4+\sqrt{15}\)=1) है। इसलिए व्युत्क्रम \(4+\sqrt{15}\) होगा।
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