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N in (-oo:+oo)
512 = ((64*N)^3)/2 // - ((64*N)^3)/2
512-(((64*N)^3)/2) = 0
-131072*N^3 = -512 // : -131072
N^3 = 1/256
N^3 = 1/256 // ^ 1/3
N = (1/256)^(1/3)
N = (1/256)^(1/3)
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