(1-1/k^2)=0.8889

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Solution for (1-1/k^2)=0.8889 equation: 


D( k )

k^2 = 0

k^2 = 0

k^2 = 0

1*k^2 = 0 // : 1

k^2 = 0

k = 0

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

1-(1/(k^2)) = 0.8889 // - 0.8889

1-(1/(k^2))-0.8889 = 0

1-k^-2-0.8889 = 0

-1*k^-2 = -0.1111 // : -1

k^-2 = 0.1111

-2 < 0

1/(k^2) = 0.1111 // * k^2

1 = 0.1111*k^2 // : 0.1111

9.00090009 = k^2

k^2 = 9.00090009 // ^ 1/2

abs(k) = 9.00090009^(1/2)

k = 9.00090009^(1/2) or k = -9.00090009^(1/2)

k in { 9.00090009^(1/2), -9.00090009^(1/2) }

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