Question
Download Solution PDFयदि \(K + \frac{1}{K} = 3 \) है, तो \({k^2} + \frac{1}{{{k^2}}}\) का मान क्या है?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिया गया है:
\(K + \frac{1}{K} = 3 \)
प्रयुक्त सूत्र:
(a + b)2 = a2 + 2ab + b2
गणना:
आइए हम दोनों पक्षों का वर्ग करते हैं:
\((K + \frac{1}{K} )^2\) = 32
k2 + (2 × k × \(1 \over k\)) + \(1 \over k^2\) = 9
k2 + 2+ \(1 \over k^2\) = 9
k2 + \(1 \over k^2\) = 9 - 2
k2 + \(1 \over k^2\) = 7
∴ k2 + \(\bf 1 \over k^2\) का मान 7 है।
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