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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
372/16.6 = 2850/x // - 2850/x
372/16.6-(2850/x) = 0
372/16.6-2850*x^-1 = 0
-2850*x^-1 = -22.40963855 // : -2850
x^-1 = 0.00786303
-1 < 0
1/(x^1) = 0.00786303 // * x^1
1 = 0.00786303*x^1 // : 0.00786303
127.17743669 = x^1
x = 127.17743669
x = 127.17743669
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