1/p^2-1=0

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Solution for 1/p^2-1=0 equation: 


D( p )

p^2 = 0

p^2 = 0

p^2 = 0

1*p^2 = 0 // : 1

p^2 = 0

p = 0

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

1/(p^2)-1 = 0

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

p^-2 = 1

-2 < 0

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

1 = 1*p^2 // : 1

1 = p^2

p^2 = 1 // ^ 1/2

abs(p) = 1

p = 1 or p = -1

p in { 1, -1 }

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