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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
5/x = X/33.8 // - X/33.8
5/x-(X/33.8) = 0
5/x-0.0295858*X = 0
5*x^-1 = -(-0.0295858*X) // : 5
x^-1 = 0.00591716*X
-1 < 0
1/(x^1) = 0.00591716*X // * x^1
1 = 0.00591716*X*x^1 // : 0.00591716*X
168.99999324*X^-1 = x^1
x = 168.99999324*X^-1
x = 168.99999324*X^-1
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