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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
x+5*x-(3/x)-3-2 = 0
x+5*x-3*x^-1-3-2 = 0
6*x^1-3*x^-1-5*x^0 = 0
(6*x^2-5*x^1-3*x^0)/(x^1) = 0 // * x^2
x^1*(6*x^2-5*x^1-3*x^0) = 0
x^1
6*x^2-5*x-3 = 0
6*x^2-5*x-3 = 0
DELTA = (-5)^2-(-3*4*6)
DELTA = 97
DELTA > 0
x = (97^(1/2)+5)/(2*6) or x = (5-97^(1/2))/(2*6)
x = (97^(1/2)+5)/12 or x = (5-97^(1/2))/12
x in { (5-97^(1/2))/12, (97^(1/2)+5)/12}
x in { (5-97^(1/2))/12, (97^(1/2)+5)/12 }
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