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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
1-(16.17/x) = 0.35 // - 0.35
1-(16.17/x)-0.35 = 0
1-16.17*x^-1-0.35 = 0
-16.17*x^-1 = -0.65 // : -16.17
x^-1 = 0.0401979
-1 < 0
1/(x^1) = 0.0401979 // * x^1
1 = 0.0401979*x^1 // : 0.0401979
24.87692143 = x^1
x = 24.87692143
x = 24.87692143
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