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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)
144*t^2+1/(t^2)+24 = 0
144*t^2+t^-2+24 = 0
t_1 = t^2
144*t_1^1+1*t_1^-1+24 = 0
144*t_1^1+1*t_1^-1+24*t_1^0 = 0
(144*t_1^2+24*t_1^1+1*t_1^0)/(t_1^1) = 0 // * t_1^2
t_1^1*(144*t_1^2+24*t_1^1+1*t_1^0) = 0
t_1^1
144*t_1^2+24*t_1+1 = 0
144*t_1^2+24*t_1+1 = 0
DELTA = 24^2-(1*4*144)
DELTA = 0
t_1 = -24/(2*144)
t_1 = -1/12 or t_1 = -1/12
t_1 in { -1/12, -1/12}
t_1 = -1/12
t^2+1/12 = 0
1*t^2 = -1/12 // : 1
t^2 = -1/12
t_1 = -1/12
t^2+1/12 = 0
1*t^2 = -1/12 // : 1
t^2 = -1/12
t belongs to the empty set
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