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D( x )
4*e-6 = 0
4*e-6 = 0
4*e-6 = 0
4*e-6 = 0
x belongs to the empty set
x in (-oo:+oo)
x = (y-0.0267)/(4*e-6) // - (y-0.0267)/(4*e-6)
x-((y-0.0267)/(4*e-6)) = 0
(-1*(y-0.0267))/(4*e-6)+x = 0
(-1*(y-0.0267))/(4*e-6)+((4*e-6)*x)/(4*e-6) = 0
(4*e-6)*x-1*(y-0.0267) = 0
(4*e-6)*x-y+0.0267 = 0
((4*e-6)*x-y+0.0267)/(4*e-6) = 0
((4*e-6)*x-y+0.0267)/(4*e-6) = 0 // * 4*e-6
(4*e-6)*x-y+0.0267 = 0
(4*e-6)*x-y+0.0267 = 0 // - 0.0267-y
(4*e-6)*x = -(0.0267-y) // : 4*e-6
x = (-(0.0267-y))/(4*e-6)
x = (y-0.0267)/(4*e-6)
x = (y-0.0267)/(4*e-6)
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