railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Algebra Identities

ଯଦି \((x+\frac{1}{x})\) = 5, ଏବଂ x > 1 ହୁଏ, \((x^8-\frac{1}{x^8} )\) ର ମୂଲ୍ୟ କେତେ ହେବ?

1
\(60605\sqrt{21}\)
2
\(60615\sqrt{21}\)
3
\(60705\sqrt{21}\)
4
\(60725\sqrt{21}\)
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