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D( t )
6*t-3 = 0
t-1 = 0
6*t-3 = 0
6*t-3 = 0
6*t-3 = 0 // + 3
6*t = 3 // : 6
t = 3/6
t = 1/2
t-1 = 0
t-1 = 0
t-1 = 0 // + 1
t = 1
t in (-oo:1/2) U (1/2:1) U (1:+oo)
1/(t-1)+t/(6*t-3) = 0
(1*(6*t-3))/((t-1)*(6*t-3))+(t*(t-1))/((t-1)*(6*t-3)) = 0
1*(6*t-3)+t*(t-1) = 0
t^2+5*t-3 = 0
t^2+5*t-3 = 0
t^2+5*t-3 = 0
DELTA = 5^2-(-3*1*4)
DELTA = 37
DELTA > 0
t = (37^(1/2)-5)/(1*2) or t = (-37^(1/2)-5)/(1*2)
t = (37^(1/2)-5)/2 or t = (-(37^(1/2)+5))/2
(t+(37^(1/2)+5)/2)*(t-((37^(1/2)-5)/2)) = 0
((t+(37^(1/2)+5)/2)*(t-((37^(1/2)-5)/2)))/((t-1)*(6*t-3)) = 0
((t+(37^(1/2)+5)/2)*(t-((37^(1/2)-5)/2)))/((t-1)*(6*t-3)) = 0 // * (t-1)*(6*t-3)
(t+(37^(1/2)+5)/2)*(t-((37^(1/2)-5)/2)) = 0
( t+(37^(1/2)+5)/2 )
t+(37^(1/2)+5)/2 = 0 // - (37^(1/2)+5)/2
t = -((37^(1/2)+5)/2)
( t-((37^(1/2)-5)/2) )
t-((37^(1/2)-5)/2) = 0 // + (37^(1/2)-5)/2
t = (37^(1/2)-5)/2
t in { -((37^(1/2)+5)/2), (37^(1/2)-5)/2 }
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