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D( n )
(3-(2*n))^3 = 0
(3-(2*n))^3 = 0
(3-(2*n))^3 = 0
(3-2*n)^3 = 0
3-2*n = 0 // - 3
-2*n = -3 // : -2
n = -3/(-2)
n = 3/2
n in (-oo:3/2) U (3/2:+oo)
((2*n-3)^4)/((3-(2*n))^3) = 0
((2*n-3)^4)/((3-2*n)^3) = 0
2*n-3 = 0 // + 3
2*n = 3 // : 2
n = 3/2
n in { 3/2}
n belongs to the empty set
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