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D( x )
x = 0
x^2 = 0
x = 0
x = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
11/x-((10*x)/(x^2))+10+100 = 0
11/x-10*x^(1-2)+10+100 = 0
(11-10)*x^-1 = -(10+100) // : 11-10
x^-1 = -((11-10)^-1*(10+100))
-1 < 0
1/(x^1) = -((11-10)^-1*(10+100)) // * x^1
1 = -(11-10)^-1*(-(10+100))*x^1 // : -((11-10)^-1*(10+100))
-1/110 = x^1
x = -1/110
x = -1/110
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