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D( n )
(e^6)/n <= 0
n = 0
(e^6)/n <= 0
(e^6)/n <= 0
e^6*n^-1 <= 0
e^6*n^-1 <= 0 // : e^6
n^-1 <= 0/(e^6)
n^-1 <= 0
1/(n^1) <= 0
n <> 0
1/(n^1) <= 0 // * n^2
(n^2)/(n^1) <= 0
n^1 <= 0
n <= 0
n in (-oo:0)
n = 0
n = 0
n in (0:+oo)
ln((e^6)/n) = 0
ln((e^6)/n) = ln(e^0)
(e^6)/n = e^0
(e^6)/n-e^0 = 0
e^6*n^-1 = 1 // : e^6
n^-1 = 1/(e^6)
-1 < 0
1/(n^1) = 1/(e^6) // * n^1
1 = (1/(e^6))*n^1 // : 1/(e^6)
e^6 = n^1
n = e^6
n = e^6
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