2/x^3+8=0

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Solution for 2/x^3+8=0 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^3)+8 = 0

2*x^-3 = -8 // : 2

x^-3 = -4

-3 < 0

1/(x^3) = -4 // * x^3

1 = -4*x^3 // : -4

-1/4 = x^3

x^3 = -1/4 // ^ 1/3

x = -(1/4)^(1/3)

x = -(1/4)^(1/3)

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