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D( x )
0.29-x = 0
0.29-x = 0
0.29-x = 0
0.29-x = 0 // - 0.29
-x = -0.29 // * -1
x = 0.29
x in (-oo:0.29) U (0.29:+oo)
24500 = 365000/(0.29-x) // - 365000/(0.29-x)
24500-(365000/(0.29-x)) = 0
24500-365000*(0.29-x)^-1 = 0
24500-365000/(0.29-x) = 0
(24500*(0.29-x))/(0.29-x)-365000/(0.29-x) = 0
24500*(0.29-x)-365000 = 0
-24500*x-357895 = 0
(-24500*x-357895)/(0.29-x) = 0
(-24500*x-357895)/(0.29-x) = 0 // * 0.29-x
-24500*x-357895 = 0
-24500*x-357895 = 0 // + 357895
-24500*x = 357895 // : -24500
x = 357895/(-24500)
x = -71579/4900
x = -71579/4900
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