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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
5/x+7/x+(25/2)/x-(3/x)-50-50+25 = 17 // - 17
5/x+7/x+(25/2)/x-(3/x)-50-50-17+25 = 0
5/x+7/x+(25/2)/x-3*x^-1-50-50-17+25 = 0
43/2*x^-1 = 92 // : 43/2
x^-1 = 184/43
-1 < 0
1/(x^1) = 184/43 // * x^1
1 = 184/43*x^1 // : 184/43
43/184 = x^1
x = 43/184
x = 43/184
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