18-1/x^2=0

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Solution for 18-1/x^2=0 equation: 


D( x )

x^2 = 0

x^2 = 0

x^2 = 0

1*x^2 = 0 // : 1

x^2 = 0

x = 0

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

18-(1/(x^2)) = 0

18-x^-2 = 0

-1*x^-2 = -18 // : -1

x^-2 = 18

-2 < 0

1/(x^2) = 18 // * x^2

1 = 18*x^2 // : 18

1/18 = x^2

x^2 = 1/18 // ^ 1/2

abs(x) = (1/18)^(1/2)

x = (1/18)^(1/2) or x = -(1/18)^(1/2)

x in { (1/18)^(1/2), -(1/18)^(1/2) }

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