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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
2/x+4/3 = (14/3)*x // - (14/3)*x
2/x-((14/3)*x)+4/3 = 0
(-14/3)*x+2/x+4/3 = 0
2*x^-1-14/3*x^1+4/3*x^0 = 0
(4/3*x^1-14/3*x^2+2*x^0)/(x^1) = 0 // * x^2
x^1*(4/3*x^1-14/3*x^2+2*x^0) = 0
x^1
(-14/3)*x^2+(4/3)*x+2 = 0
(-14/3)*x^2+(4/3)*x+2 = 0
DELTA = (4/3)^2-(2*4*(-14/3))
DELTA = 352/9
DELTA > 0
x = ((352/9)^(1/2)-(4/3))/(2*(-14/3)) or x = (-(4/3)-(352/9)^(1/2))/(2*(-14/3))
x = -3/28*((352/9)^(1/2)-4/3) or x = 3/28*((352/9)^(1/2)+4/3)
x in { -3/28*((352/9)^(1/2)-4/3), 3/28*((352/9)^(1/2)+4/3)}
x in { -3/28*((352/9)^(1/2)-4/3), 3/28*((352/9)^(1/2)+4/3) }
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