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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
1.33/x = 10 // - 10
1.33/x-10 = 0
1.33*x^-1 = 10 // : 1.33
x^-1 = 7.51879699
-1 < 0
1/(x^1) = 7.51879699 // * x^1
1 = 7.51879699*x^1 // : 7.51879699
0.133 = x^1
x = 0.133
x = 0.133
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