1/81=x^4

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Solution for 1/81=x^4 equation: 


x in (-oo:+oo)

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

1/81-x^4 = 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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