यदि \(x=4-\sqrt{7}\) है तो \( \frac{1}{x} \) किसके बराबर है?
If \(x=4-\sqrt{7}\), then \( \frac{1}{x} \) equals what?
Explanation opens after your attempt
Correct Answer
A. \( \frac{4+\sqrt{7}}{9} \)
Concept
Multiply \( \frac{1}{4-\sqrt{7}} \) by the conjugate. The denominator is (16-7=9) and the numerator is \(4+\sqrt{7}\).
Why this answer is correct
The correct answer is A. \( \frac{4+\sqrt{7}}{9} \). Multiply \( \frac{1}{4-\sqrt{7}} \) by the conjugate. The denominator is (16-7=9) and the numerator is \(4+\sqrt{7}\).
Exam Tip
\( \frac{1}{4-\sqrt{7}} \) को संयुग्मी से गुणा करें। हर (16-7=9) और अंश \(4+\sqrt{7}\) होगा।
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