2x+2/x^3

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Solution for 2x+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)

2*x+2/(x^3) = 0

2*x+2*x^-3 = 0

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

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

x^-4 = -1

-4 < 0

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

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

-1 = x^4

2*x = 0

2*x = 0 // : 2

x = 0

x in { 0} 

x belongs to the empty set

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