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D( n )
n = 0
n = 0
n = 0
n in (-oo:0) U (0:+oo)
8*n^2-((24*n)/n)-3 = 0
8*n^2-24-3 = 0
8*n^2 = 27 // : 8
n^2 = 27/8
n^2 = 27/8 // ^ 1/2
abs(n) = (27/8)^(1/2)
n = (27/8)^(1/2) or n = -(27/8)^(1/2)
n in { (27/8)^(1/2), -(27/8)^(1/2) }
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