Expert Mathematics Polynomials Class 10 Level 27

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
Correct Answer

A. \(4+\sqrt{15}\)

Step 1

Concept

(\(4-\sqrt{15}\)\(4+\sqrt{15}\)=1). Therefore the reciprocal is \(4+\sqrt{15}\).

Step 2

Why this answer is correct

The correct answer is A. \(4+\sqrt{15}\). (\(4-\sqrt{15}\)\(4+\sqrt{15}\)=1). Therefore the reciprocal is \(4+\sqrt{15}\).

Step 3

Exam Tip

(\(4-\sqrt{15}\)\(4+\sqrt{15}\)=1) है। इसलिए व्युत्क्रम \(4+\sqrt{15}\) होगा।

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FAQs

Mathematics Answer, Explanation and Revision Hints

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?

Correct Answer: A. \(4+\sqrt{15}\). Explanation: (\(4-\sqrt{15}\)\(4+\sqrt{15}\)=1) है। इसलिए व्युत्क्रम \(4+\sqrt{15}\) होगा। / (\(4-\sqrt{15}\)\(4+\sqrt{15}\)=1). Therefore the reciprocal is \(4+\sqrt{15}\).

Which concept should I revise for this Mathematics MCQ?

(\(4-\sqrt{15}\)\(4+\sqrt{15}\)=1). Therefore the reciprocal is \(4+\sqrt{15}\).

What exam hint can help solve this Mathematics question?

(\(4-\sqrt{15}\)\(4+\sqrt{15}\)=1) है। इसलिए व्युत्क्रम \(4+\sqrt{15}\) होगा।

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