Correct Answer: Option A
X2 + 1/x2 = (x – 1/x)2 + 2*x*1/x
= (x-1/x)2 + 2
= (2)2 + 2
= 4 + 2 = 6
আবার,
X4 + 1/x4 = (x2 + 1/x2)2 - 2*x2*1/x2
= 62 – 2
= 36 – 2
= 34
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