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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
11/x = (-4/3)*x+7 // - (-4/3)*x+7
11/x-((-4/3)*x)-7 = 0
(4/3)*x+11/x-7 = 0
4/3*x^1+11*x^-1-7*x^0 = 0
(4/3*x^2-7*x^1+11*x^0)/(x^1) = 0 // * x^2
x^1*(4/3*x^2-7*x^1+11*x^0) = 0
x^1
(4/3)*x^2-7*x+11 = 0
(4/3)*x^2-7*x+11 = 0
DELTA = (-7)^2-(4*11*(4/3))
DELTA = -29/3
DELTA < 0
x in { }
x belongs to the empty set
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