UPSC CDS Math Basic operation and Factorisation Questions

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Question : 18 of 77

Marks: +1, -0

If x6+

1

x6

= k (x2+

1

x2

) , then k is equal to

[2018 CDS-II]

(x2−1+
1
x2
)
(x4−1+
1
x4
)
(x4+1+
1
x4
)
(x4−1−
1
x4
)

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