If (x−1x) = 21−−√,(x−1x) = 21, then the value of (x2+1x2 – McqOptions

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1.	If (x−1x) = 21−−√,(x−1x) = 21, then the value of (x2+1x2)(x+1x)(x2+1x2)(x+1x) is = ?
A.	42
B.	63
C.	115
D.	120
Answer» B. 63

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