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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
1/x = 0.0280584498494619 // - 0.0280584498494619
1/x-0.0280584498494619 = 0
1*x^-1 = 0.0280584498494619 // : 1
x^-1 = 0.0280584498494619
-1 < 0
1/(x^1) = 0.0280584498494619 // * x^1
1 = 0.0280584498494619*x^1 // : 0.0280584498494619
35.63988764 = x^1
x = 35.63988764
x = 35.63988764
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