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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
18963/x = 5.5/100 // - 5.5/100
18963/x-(5.5/100) = 0
18963/x-0.055 = 0
18963*x^-1 = 0.055 // : 18963
x^-1 = 0.0000029
-1 < 0
1/(x^1) = 0.0000029 // * x^1
1 = 0.0000029*x^1 // : 0.0000029
344827.5862069 = x^1
x = 344827.5862069
x = 344827.5862069
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