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D( x )
x^2 = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
16*x-(1024/(x^2)) = 0
16*x-1024*x^-2 = 0
16*x^1-1024*x^-2 = 0
(16*x^3-1024*x^0)/(x^2) = 0 // * x^4
x^2*(16*x^3-1024*x^0) = 0
x^2
16*x^3-1024 = 0
{ 1, -1, 2, -2, 4, -4, 8, -8, 16, -16, 32, -32, 64, -64, 128, -128, 256, -256, 512, -512, 1024, -1024 }
1
x = 1
16*x^3-1024 = -1008
1
-1
x = -1
16*x^3-1024 = -1040
-1
2
x = 2
16*x^3-1024 = -896
2
-2
x = -2
16*x^3-1024 = -1152
-2
4
x = 4
16*x^3-1024 = 0
4
x-4
16*x^2+64*x+256
16*x^3-1024
x-4
64*x^2-16*x^3
64*x^2-1024
256*x-64*x^2
256*x-1024
1024-256*x
0
16*x^2+64*x+256 = 0
DELTA = 64^2-(4*16*256)
DELTA = -12288
DELTA < 0
x in { 4}
x = 4
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