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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3*x-x-((4/3)*x)+7/x-6-2 = 0
3*x-x+(-4/3)*x+7/x-6-2 = 0
2/3*x^1+7*x^-1-8*x^0 = 0
(2/3*x^2-8*x^1+7*x^0)/(x^1) = 0 // * x^2
x^1*(2/3*x^2-8*x^1+7*x^0) = 0
x^1
(2/3)*x^2-8*x+7 = 0
(2/3)*x^2-8*x+7 = 0
DELTA = (-8)^2-(4*7*(2/3))
DELTA = 136/3
DELTA > 0
x = ((136/3)^(1/2)+8)/(2*(2/3)) or x = (8-(136/3)^(1/2))/(2*(2/3))
x = 3/4*((136/3)^(1/2)+8) or x = 3/4*(8-(136/3)^(1/2))
x in { 3/4*(8-(136/3)^(1/2)), 3/4*((136/3)^(1/2)+8)}
x in { 3/4*(8-(136/3)^(1/2)), 3/4*((136/3)^(1/2)+8) }
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