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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3*x-(5/x)-5 = -4/3 // + -4/3
3*x-(5/x)-(-4/3)-5 = 0
3*x-5*x^-1+4/3-5 = 0
3*x^1-5*x^-1-11/3*x^0 = 0
(3*x^2-11/3*x^1-5*x^0)/(x^1) = 0 // * x^2
x^1*(3*x^2-11/3*x^1-5*x^0) = 0
x^1
3*x^2+(-11/3)*x-5 = 0
3*x^2+(-11/3)*x-5 = 0
DELTA = (-11/3)^2-(-5*3*4)
DELTA = 661/9
DELTA > 0
x = ((661/9)^(1/2)-(-11/3))/(2*3) or x = (-(-11/3)-(661/9)^(1/2))/(2*3)
x = ((661/9)^(1/2)+11/3)/6 or x = (11/3-(661/9)^(1/2))/6
x in { (11/3-(661/9)^(1/2))/6, ((661/9)^(1/2)+11/3)/6}
x in { (11/3-(661/9)^(1/2))/6, ((661/9)^(1/2)+11/3)/6 }
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