Question
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Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFఇచ్చిన సమస్య:
x2 + (1/x2) = 7
ఉపయోగించిన సూత్రం:
x2 + (1/x2) = P
అప్పుడు x + (1/x) = √(P + 2)
మరియు x - (1/x) = √(P - 2)
⇒ x2 - (1/x2) = {x + (1/x)} × {x - (1/x)}
సాధన:
x2 + (1/x2) = 7
⇒ x + (1/x) = √(7 + 2) = √9
⇒ x + (1/x) = 3
⇒ x - (1/x) = √(7 - 2)
⇒ x - (1/x) = - √5 {0
x2 - (1/x2) = {x + (1/x)} × {x - (1/x)}
⇒ 3 × (- √5)
∴ సరైన సమాధానం - 3√5.
Mistake Point
గమనిక
0
కావున
1/x > 1
కావున
x + 1/x > 1
మరియు
x - 1/x 1 కావున, x - 1/x
కావున
(x - 1/x)(x + 1/x)
Last updated on Jul 19, 2025
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