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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
2*x-x+4/x-(5/x)-3+3 = 10*x+17/x+3 // - 10*x+17/x+3
2*x-x-(10*x)+4/x-(5/x)-(17/x)-3-3+3 = 0
2*x-x-10*x+4/x-5*x^-1-17*x^-1-3-3+3 = 0
-9*x^1-18*x^-1-3*x^0 = 0
(-9*x^2-3*x^1-18*x^0)/(x^1) = 0 // * x^2
x^1*(-9*x^2-3*x^1-18*x^0) = 0
x^1
-9*x^2-3*x-18 = 0
-9*x^2-3*x-18 = 0
DELTA = (-3)^2-(-18*(-9)*4)
DELTA = -639
DELTA < 0
x in { }
x belongs to the empty set
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