4x^3-2/x^4

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Solution for 4x^3-2/x^4 equation: 


D( x )

x^4 = 0

x^4 = 0

x^4 = 0

1*x^4 = 0 // : 1

x^4 = 0

x = 0

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

4*x^3-(2/(x^4)) = 0

4*x^3-2*x^-4 = 0

4*x^3-2*x^-4 = 0

2*x^3*(2-x^-7) = 0

-1*x^-7 = -2 // : -1

x^-7 = 2

-7 < 0

1/(x^7) = 2 // * x^7

1 = 2*x^7 // : 2

1/2 = x^7

x^7 = 1/2 // ^ 1/7

x = (1/2)^(1/7)

2*x^3 = 0

2*x^3 = 0 // : 2

x^3 = 0

x = 0

x in { 0} 

x = (1/2)^(1/7)

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