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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
1/x = 0.079461 // - 0.079461
1/x-0.079461 = 0
1*x^-1 = 0.079461 // : 1
x^-1 = 0.079461
-1 < 0
1/(x^1) = 0.079461 // * x^1
1 = 0.079461*x^1 // : 0.079461
12.58479002 = x^1
x = 12.58479002
x = 12.58479002
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