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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3*x-(24/x) = 0
3*x-24*x^-1 = 0
3*x^1-24*x^-1 = 0
(3*x^2-24*x^0)/(x^1) = 0 // * x^2
x^1*(3*x^2-24*x^0) = 0
x^1
3*x^2-24 = 0
3*x^2-24 = 0
DELTA = 0^2-(-24*3*4)
DELTA = 288
DELTA > 0
x = (288^(1/2)+0)/(2*3) or x = (0-288^(1/2))/(2*3)
x = 2*2^(1/2) or x = -2*2^(1/2)
x in { -2*2^(1/2), 2*2^(1/2)}
x in { -2*2^(1/2), 2*2^(1/2) }
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