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