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D( x )
x+1 = 0
x+1 = 0
x+1 = 0
x+1 = 0 // - 1
x = -1
x in (-oo:-1) U (-1:+oo)
(x^3+3*x^2+3*x+1)/(x+1) = 0
x^3+3*x^2+3*x+1 = 0
x^3+3*x^2+3*x+1 = 0
{ 1, -1 }
1
x = 1
x^3+3*x^2+3*x+1 = 8
1
-1
x = -1
x^3+3*x^2+3*x+1 = 0
-1
x+1
x^2+2*x+1
x^3+3*x^2+3*x+1
x+1
-x^3-x^2
2*x^2+3*x+1
-2*x^2-2*x
x+1
-x-1
0
x^2+2*x+1 = 0
DELTA = 2^2-(1*1*4)
DELTA = 0
x = -2/(1*2)
x = -1 or x = -1
x in { -1, -1, -1}
(x+1)^3 = 0
(x+1)^2 = 0
x+1 = 0 // - 1
x = -1
x in { -1}
x belongs to the empty set
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