9t/t^2+1

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Solution for 9t/t^2+1 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)

(9*t)/(t^2)+1 = 0

9*t^-1 = -1 // : 9

t^-1 = -1/9

-1 < 0

1/(t^1) = -1/9 // * t^1

1 = -1/9*t^1 // : -1/9

-9 = t^1

t = -9

t = -9

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