x+2/x^3

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Solution for x+2/x^3 equation: 


D( x )

x^3 = 0

x^3 = 0

x^3 = 0

1*x^3 = 0 // : 1

x^3 = 0

x = 0

x in (-oo:0) U (0:+oo)

x+2/(x^3) = 0

x+2*x^-3 = 0

x*(2*x^-4+1) = 0

2*x^-4 = -1 // : 2

x^-4 = -1/2

-4 < 0

1/(x^4) = -1/2 // * x^4

1 = -1/2*x^4 // : -1/2

-2 = x^4

x = 0

x = 0

x in { 0} 

x belongs to the empty set

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