x^4=1/81

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Solution for x^4=1/81 equation: 


x in (-oo:+oo)

x^4 = 1/81 // - 1/81

x^4-(1/81) = 0

x^4-1/81 = 0

1*x^4 = 1/81 // : 1

x^4 = 1/81

x^4 = 1/81 // ^ 1/4

abs(x) = 1/3

x = 1/3 or x = -1/3

x in { 1/3, -1/3 }

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