Question

If (x+1/x)^2=3, then the value of x^72+x^66+x^54+

Answer 1

$1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 + 13 + 14 + 15 + 16 + 17 + 18 + 19 + 20 |?|$
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