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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
x+1/x-(5/3)-3 = 0
x+1/x-5/3-3 = 0
1*x^1+1*x^-1-14/3*x^0 = 0
(1*x^2-14/3*x^1+1*x^0)/(x^1) = 0 // * x^2
x^1*(1*x^2-14/3*x^1+1*x^0) = 0
x^1
x^2+(-14/3)*x+1 = 0
x^2+(-14/3)*x+1 = 0
DELTA = (-14/3)^2-(1*1*4)
DELTA = 160/9
DELTA > 0
x = ((160/9)^(1/2)-(-14/3))/(1*2) or x = (-(-14/3)-(160/9)^(1/2))/(1*2)
x = ((160/9)^(1/2)+14/3)/2 or x = (14/3-(160/9)^(1/2))/2
x in { (14/3-(160/9)^(1/2))/2, ((160/9)^(1/2)+14/3)/2}
x in { (14/3-(160/9)^(1/2))/2, ((160/9)^(1/2)+14/3)/2 }
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