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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3.2/x = 100/4117 // - 100/4117
3.2/x-(100/4117) = 0
3.2/x-100/4117 = 0
3.2*x^-1 = 100/4117 // : 3.2
x^-1 = 0.00759048
-1 < 0
1/(x^1) = 0.00759048 // * x^1
1 = 0.00759048*x^1 // : 0.00759048
131.74397403 = x^1
x = 131.74397403
x = 131.74397403
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