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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3.8/95 = 5.7/x // - 5.7/x
3.8/95-(5.7/x) = 0
3.8/95-5.7*x^-1 = 0
-5.7*x^-1 = -0.04 // : -5.7
x^-1 = 0.00701754
-1 < 0
1/(x^1) = 0.00701754 // * x^1
1 = 0.00701754*x^1 // : 0.00701754
142.50007838 = x^1
x = 142.50007838
x = 142.50007838
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