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D( n )
2.864^2 = 0
2.864^2 = 0
2.864^2 = 0
2.864^2 = 0
n belongs to the empty set
n in (-oo:+oo)
n = (1^2*n)/(2.864^2) // - (1^2*n)/(2.864^2)
n-((1^2*n)/(2.864^2)) = 0
n-(n/(2.864^2)) = 0
(1-2.864^-2)*n = 0 // : 1-2.864^-2
n = 0
n = 0
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