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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
x-(2/x) = 11/12-((11/4)*x) // - 11/12-((11/4)*x)
x+(11/4)*x-(2/x)-(11/12) = 0
x+(11/4)*x-2*x^-1-11/12 = 0
15/4*x^1-2*x^-1-11/12*x^0 = 0
(15/4*x^2-11/12*x^1-2*x^0)/(x^1) = 0 // * x^2
x^1*(15/4*x^2-11/12*x^1-2*x^0) = 0
x^1
(15/4)*x^2+(-11/12)*x-2 = 0
(15/4)*x^2+(-11/12)*x-2 = 0
DELTA = (-11/12)^2-(-2*4*(15/4))
DELTA = 4441/144
DELTA > 0
x = ((4441/144)^(1/2)-(-11/12))/(2*(15/4)) or x = (-(-11/12)-(4441/144)^(1/2))/(2*(15/4))
x = 2/15*((4441/144)^(1/2)+11/12) or x = 2/15*(11/12-(4441/144)^(1/2))
x in { 2/15*(11/12-(4441/144)^(1/2)), 2/15*((4441/144)^(1/2)+11/12)}
x in { 2/15*(11/12-(4441/144)^(1/2)), 2/15*((4441/144)^(1/2)+11/12) }
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