1/x^4-2x^3

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Solution for 1/x^4-2x^3 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)

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

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

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

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

x^3 = 0

1*x^3 = 0 // : 1

x^3 = 0

x = 0

x in { 0} 

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

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