If x4+1/x4=322, then (2x–4)2 = ?
(a) 14
(b) 20
(c) 16
(d) 24
Sol:
If x4+1/x4=322, then (2x–4)2 = ?
(a) 14
(b) 20
(c) 16
(d) 24
Sol:
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