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D( x )
3*x-2 = 0
3*x-2 = 0
3*x-2 = 0
3*x-2 = 0 // + 2
3*x = 2 // : 3
x = 2/3
x in (-oo:2/3) U (2/3:+oo)
0 = (27*x^3-8)/(3*x-2) // - (27*x^3-8)/(3*x-2)
0-((27*x^3-8)/(3*x-2)) = 0
-((27*x^3-8)/(3*x-2)) = 0
(-1*(27*x^3-8))/(3*x-2) = 0
( -1 )
-1 = 0
x belongs to the empty set
( 27*x^3-8 )
27*x^3 = 8 // : 27
x^3 = 8/27
x^3 = 8/27 // ^ 1/3
x = 2/3
x in { 2/3}
x belongs to the empty set
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