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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3*(16/x) = x-2 // - x-2
3*(16/x)-x+2 = 0
48*x^-1-1*x^1+2*x^0 = 0
(2*x^1-1*x^2+48*x^0)/(x^1) = 0 // * x^2
x^1*(2*x^1-1*x^2+48*x^0) = 0
x^1
2*x-x^2+48 = 0
2*x-x^2+48 = 0
DELTA = 2^2-(-1*4*48)
DELTA = 196
DELTA > 0
x = (196^(1/2)-2)/(-1*2) or x = (-196^(1/2)-2)/(-1*2)
x = -6 or x = 8
x in { -6, 8}
x in { -6, 8 }
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