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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
4040565/x = 14.95 // - 14.95
4040565/x-14.95 = 0
4040565*x^-1 = 14.95 // : 4040565
x^-1 = 0.0000037
-1 < 0
1/(x^1) = 0.0000037 // * x^1
1 = 0.0000037*x^1 // : 0.0000037
270270.27027027 = x^1
x = 270270.27027027
x = 270270.27027027
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