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D( x )
x = 0
2/x <= 0
x = 0
x = 0
2/x <= 0
2/x <= 0
2*x^-1 <= 0
2*x^-1 <= 0 // : 2
x^-1 <= 0/2
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)
0.1 = 0.01284*ln(2/x) // - 0.01284*ln(2/x)
0.1-(0.01284*ln(2/x)) = 0
0.1-0.01284*ln(2/x) = 0
0.1-0.01284*ln(2/x) = 0 // - 0.1
-0.01284*ln(2/x) = -0.1 // : -0.01284
ln(2/x) = -0.1/(-0.01284)
ln(2/x) = 7.78816199
ln(2/x) = ln(e^7.78816199)
2/x = e^7.78816199
2/x-e^7.78816199 = 0
2*x^-1 = e^7.78816199 // : 2
x^-1 = (e^7.78816199)/2
-1 < 0
1/(x^1) = (e^7.78816199)/2 // * x^1
1 = ((e^7.78816199)/2)*x^1 // : (e^7.78816199)/2
2*e^-7.78816199 = x^1
x = 2*e^-7.78816199
x = 2*e^-7.78816199
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