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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
((10/3)*x^2)/3+((10/3)*x^-1)/3 = 0
10/9*x^2+10/9*x^-1 = 0
(10/9*x^3+10/9*x^0)/(x^1) = 0 // * x^2
x^1*(10/9*x^3+10/9*x^0) = 0
x^1
(10/9)*x^3+10/9 = 0
(10/9)*x^3+10/9 = 0 // * 0
{ 1, -1, 2, -2, 5, -5, 10, -10 }
1
x = 1
10*x^3+10 = 20
1
-1
x = -1
10*x^3+10 = 0
-1
x+1
10*x^2-10*x+10
10*x^3+10
x+1
-10*x^3-10*x^2
10-10*x^2
10*x^2+10*x
10*x+10
-10*x-10
0
10*x^2-10*x+10 = 0
DELTA = (-10)^2-(4*10*10)
DELTA = -300
DELTA < 0
x in { -1}
x = -1
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