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D( x )
x^3 = 0
x^3 = 0
x^3 = 0
1*x^3 = 0 // : 1
x^3 = 0
x = 0
x in (-oo:0) U (0:+oo)
12*x-(12/(x^3)) = 0
12*x-12*x^-3 = 0
12*x^1-12*x^-3 = 0
(12*x^4-12*x^0)/(x^3) = 0 // * x^6
x^3*(12*x^4-12*x^0) = 0
x^3
12*x^4-12 = 0
{ 1, -1, 2, -2, 3, -3, 4, -4, 6, -6, 12, -12 }
1
x = 1
12*x^4-12 = 0
1
x-1
12*x^3+12*x^2+12*x+12
12*x^4-12
x-1
12*x^3-12*x^4
12*x^3-12
12*x^2-12*x^3
12*x^2-12
12*x-12*x^2
12*x-12
12-12*x
0
12*x^3+12*x^2+12*x+12 = 0
{ 1, -1, 2, -2, 3, -3, 4, -4, 6, -6, 12, -12 }
1
x = 1
12*x^3+12*x^2+12*x+12 = 48
1
-1
x = -1
12*x^3+12*x^2+12*x+12 = 0
-1
x+1
12*x^2+12
12*x^3+12*x^2+12*x+12
x+1
-12*x^3-12*x^2
12*x+12
-12*x-12
0
12*x^2+12 = 0
DELTA = 0^2-(4*12*12)
DELTA = -576
DELTA < 0
x in { 1, -1}
x in { 1, -1 }
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