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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
6/x-((2*x)/3)+16 = 0
(-2/3)*x+6/x+16 = 0
6*x^-1-2/3*x^1+16*x^0 = 0
(16*x^1-2/3*x^2+6*x^0)/(x^1) = 0 // * x^2
x^1*(16*x^1-2/3*x^2+6*x^0) = 0
x^1
(-2/3)*x^2+16*x+6 = 0
(-2/3)*x^2+16*x+6 = 0
DELTA = 16^2-(4*6*(-2/3))
DELTA = 272
DELTA > 0
x = (272^(1/2)-16)/(2*(-2/3)) or x = (-272^(1/2)-16)/(2*(-2/3))
x = -3/4*(4*17^(1/2)-16) or x = -3/4*(-4*17^(1/2)-16)
x in { -3/4*(4*17^(1/2)-16), -3/4*(-4*17^(1/2)-16)}
x in { -3/4*(4*17^(1/2)-16), -3/4*(-4*17^(1/2)-16) }
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