(2t-4)/(t^2-4)

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Solution for (2t-4)/(t^2-4) equation: 


D( t )

t^2-4 = 0

t^2-4 = 0

t^2-4 = 0

1*t^2 = 4 // : 1

t^2 = 4

t^2 = 4 // ^ 1/2

abs(t) = 2

t = 2 or t = -2

t in (-oo:-2) U (-2:2) U (2:+oo)

(2*t-4)/(t^2-4) = 0

2*t-4 = 0 // + 4

2*t = 4 // : 2

t = 4/2

t = 2

t in { 2} 

t belongs to the empty set

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