1-1/t2=0.8

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Solution for 1-1/t2=0.8 equation: 


D( t )

t^2 = 0

t^2 = 0

t^2 = 0

1*t^2 = 0 // : 1

t^2 = 0

t = 0

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

1-(1/(t^2)) = 0.8 // - 0.8

1-(1/(t^2))-0.8 = 0

1-t^-2-0.8 = 0

-1*t^-2 = -0.2 // : -1

t^-2 = 0.2

-2 < 0

1/(t^2) = 0.2 // * t^2

1 = 0.2*t^2 // : 0.2

5 = t^2

t^2 = 5 // ^ 1/2

abs(t) = 5^(1/2)

t = 5^(1/2) or t = -5^(1/2)

t in { 5^(1/2), -5^(1/2) }

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