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D( n )
n = 0
n = 0
n = 0
n in (-oo:0) U (0:+oo)
8.93/4.44 = 4.49/n // - 4.49/n
8.93/4.44-(4.49/n) = 0
8.93/4.44-4.49*n^-1 = 0
-4.49*n^-1 = -2.01126126 // : -4.49
n^-1 = 0.44794237
-1 < 0
1/(n^1) = 0.44794237 // * n^1
1 = 0.44794237*n^1 // : 0.44794237
2.23243003 = n^1
n = 2.23243003
n = 2.23243003
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