1-1/X2

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Solution for 1-1/X2 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)

1-(1/(X^2)) = 0

1-X^-2 = 0

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

X^-2 = 1

-2 < 0

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

1 = 1*X^2 // : 1

1 = X^2

X^2 = 1 // ^ 1/2

abs(X) = 1

X = 1 or X = -1

X in { 1, -1 }

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