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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(2532500/x)/1277.59 = 27.68 // - 27.68
(2532500/x)/1277.59-27.68 = 0
1982.24782598*x^-1 = 27.68 // : 1982.24782598
x^-1 = 0.01396395
-1 < 0
1/(x^1) = 0.01396395 // * x^1
1 = 0.01396395*x^1 // : 0.01396395
71.61297484 = x^1
x = 71.61297484
x = 71.61297484
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