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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
6 = 11/x-((8/2)*x) // - 11/x-((8/2)*x)
(8/2)*x-(11/x)+6 = 0
(8/2)*x-11*x^-1+6 = 0
4*x^1-11*x^-1+6*x^0 = 0
(4*x^2+6*x^1-11*x^0)/(x^1) = 0 // * x^2
x^1*(4*x^2+6*x^1-11*x^0) = 0
x^1
4*x^2+6*x-11 = 0
4*x^2+6*x-11 = 0
DELTA = 6^2-(-11*4*4)
DELTA = 212
DELTA > 0
x = (212^(1/2)-6)/(2*4) or x = (-212^(1/2)-6)/(2*4)
x = (2*53^(1/2)-6)/8 or x = (-2*53^(1/2)-6)/8
x in { (-2*53^(1/2)-6)/8, (2*53^(1/2)-6)/8}
x in { (-2*53^(1/2)-6)/8, (2*53^(1/2)-6)/8 }
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