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D( x )
x^3-(16*x) = 0
x^3-(16*x) = 0
x^3-(16*x) = 0
x^3-16*x = 0
x^3-16*x = 0
x*(x^2-16) = 0
1*x^2 = 16 // : 1
x^2 = 16
x^2 = 16 // ^ 1/2
abs(x) = 4
x = 4 or x = -4
x = 0
x = 0
x in (-oo:-4) U (-4:0) U (0:4) U (4:+oo)
(2*x-8)/(x^3-(16*x)) = 0
(2*x-8)/(x^3-16*x) = 0
x^3-16*x = 0
x*(x^2-16) = 0
1*x^2 = 16 // : 1
x^2 = 16
x^2 = 16 // ^ 1/2
abs(x) = 4
x = 4 or x = -4
x*(x-4)*(x+4) = 0
(2*x-8)/(x*(x-4)*(x+4)) = 0
2*x-8 = 0 // + 8
2*x = 8 // : 2
x = 8/2
x = 4
x in { 4}
x belongs to the empty set
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