X^-2/3=9

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Solution for X^-2/3=9 equation: 


D( X )

X = 0

X = 0

X = 0

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

(X^-2)/3 = 9 // - 9

(X^-2)/3-9 = 0

1/3*X^-2 = 9 // : 1/3

X^-2 = 27

-2 < 0

1/(X^2) = 27 // * X^2

1 = 27*X^2 // : 27

1/27 = X^2

X^2 = 1/27 // ^ 1/2

abs(X) = (1/27)^(1/2)

X = (1/27)^(1/2) or X = -(1/27)^(1/2)

X in { (1/27)^(1/2), -(1/27)^(1/2) }

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