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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
0.15 = (x-731895)/x // - (x-731895)/x
0.15-((x-731895)/x) = 0
(-1*(x-731895))/x+0.15 = 0
(-1*(x-731895))/x+(0.15*x)/x = 0
0.15*x-1*(x-731895) = 0
731895-0.85*x = 0
(731895-0.85*x)/x = 0
(731895-0.85*x)/x = 0 // * x
731895-0.85*x = 0
731895-0.85*x = 0 // - 731895
-0.85*x = -731895 // : -0.85
x = -731895/(-0.85)
x = 861052.94117647
x = 861052.94117647
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