X^-4=1/81

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Solution for X^-4=1/81 equation: 


D( X )

X = 0

X = 0

X = 0

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

-4 < 0

1/(X^4) = 1/81 // * X^4

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

81 = X^4

X^4 = 81 // ^ 1/4

abs(X) = 3

X = 3 or X = -3

X in { 3, -3 }

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