3-((1)/(3x)^2/3)

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Solution for 3-((1)/(3x)^2/3) equation: 


D( x )

(3*x)^2 = 0

(3*x)^2 = 0

(3*x)^2 = 0

9*x^2 = 0 // : 9

x^2 = 0

x = 0

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

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

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

-1/27*x^-2 = -3 // : -1/27

x^-2 = 81

-2 < 0

1/(x^2) = 81 // * x^2

1 = 81*x^2 // : 81

1/81 = x^2

x^2 = 1/81 // ^ 1/2

abs(x) = 1/9

x = 1/9 or x = -1/9

x in { 1/9, -1/9 }

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