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D( x )
x = 0
0.086/x <= 0
x = 0
x = 0
0.086/x <= 0
0.086/x <= 0
0.086*x^-1 <= 0
0.086*x^-1 <= 0 // : 0.086
x^-1 <= 0/0.086
x^-1 <= 0
1/(x^1) <= 0
x <> 0
1/(x^1) <= 0 // * x^2
(x^2)/(x^1) <= 0
x^1 <= 0
x <= 0
x in (-oo:0)
x in (0:+oo)
ln(0.086/x) = 17.6 // - 17.6
ln(0.086/x)-17.6 = 0
ln(0.086/x)-17.6 = 0 // + 17.6
ln(0.086/x) = 17.6
ln(0.086/x) = ln(e^17.6)
0.086/x = e^17.6
0.086/x-e^17.6 = 0
0.086*x^-1 = e^17.6 // : 0.086
x^-1 = 11.62790698*e^17.6
-1 < 0
1/(x^1) = 11.62790698*e^17.6 // * x^1
1 = 11.62790698*e^17.6*x^1 // : 11.62790698*e^17.6
0.086*e^-17.6 = x^1
x = 0.086*e^-17.6
x = 0.086*e^-17.6
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