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D( x )
x = 0
0.3/x <= 0
x = 0
x = 0
0.3/x <= 0
0.3/x <= 0
0.3*x^-1 <= 0
0.3*x^-1 <= 0 // : 0.3
x^-1 <= 0/0.3
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(0.3/x) = 0.37 // - 0.37
ln(0.3/x)-0.37 = 0
ln(0.3/x)-0.37 = 0 // + 0.37
ln(0.3/x) = 0.37
ln(0.3/x) = ln(e^0.37)
0.3/x = e^0.37
0.3/x-e^0.37 = 0
0.3*x^-1 = e^0.37 // : 0.3
x^-1 = 3.33333333*e^0.37
-1 < 0
1/(x^1) = 3.33333333*e^0.37 // * x^1
1 = 3.33333333*e^0.37*x^1 // : 3.33333333*e^0.37
0.3*e^-0.37 = x^1
x = 0.3*e^-0.37
x = 0.3*e^-0.37
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