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D( x )
x = 0
x^2 = 0
x = 0
x = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
x-(16/(x^2)) = 8-(2/x) // - 8-(2/x)
x+2/x-(16/(x^2))-8 = 0
x+2/x-16*x^-2-8 = 0
1*x^1+2*x^-1-16*x^-2-8*x^0 = 0
(1*x^3-8*x^2+2*x^1-16*x^0)/(x^2) = 0 // * x^4
x^2*(1*x^3-8*x^2+2*x^1-16*x^0) = 0
x^2
x^3-8*x^2+2*x-16 = 0
{ 1, -1, 2, -2, 4, -4, 8, -8, 16, -16 }
1
x = 1
x^3-8*x^2+2*x-16 = -21
1
-1
x = -1
x^3-8*x^2+2*x-16 = -27
-1
2
x = 2
x^3-8*x^2+2*x-16 = -36
2
-2
x = -2
x^3-8*x^2+2*x-16 = -60
-2
4
x = 4
x^3-8*x^2+2*x-16 = -72
4
-4
x = -4
x^3-8*x^2+2*x-16 = -216
-4
8
x = 8
x^3-8*x^2+2*x-16 = 0
8
x-8
x^2+2
x^3-8*x^2+2*x-16
x-8
8*x^2-x^3
2*x-16
16-2*x
0
x^2+2 = 0
DELTA = 0^2-(1*2*4)
DELTA = -8
DELTA < 0
x in { 8}
x = 8
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