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D( x )
(3.46*10^-5)/x <= 0
x = 0
(3.46*10^-5)/x <= 0
(3.46*10^-5)/x <= 0
0.0000346*x^-1 <= 0
0.0000346*x^-1 <= 0 // : 0.0000346
x^-1 <= 0/0.0000346
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 = 0
x = 0
x in (0:+oo)
ln((3.46*10^-5)/x) = 0.9819 // - 0.9819
ln((3.46*10^-5)/x)-0.9819 = 0
ln((3.46*10^-5)/x)-0.9819 = 0 // + 0.9819
ln((3.46*10^-5)/x) = 0.9819
ln((3.46*10^-5)/x) = ln(e^0.9819)
(3.46*10^-5)/x = e^0.9819
(3.46*10^-5)/x-e^0.9819 = 0
0.0000346*x^-1 = e^0.9819 // : 0.0000346
x^-1 = 28901.73410405*e^0.9819
-1 < 0
1/(x^1) = 28901.73410405*e^0.9819 // * x^1
1 = 28901.73410405*e^0.9819*x^1 // : 28901.73410405*e^0.9819
0.0000346*e^-0.9819 = x^1
x = 0.0000346*e^-0.9819
x = 0.0000346*e^-0.9819
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