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D( T )
T = 0
T = 0
T = 0
T in (-oo:0) U (0:+oo)
32/T-2*T+12 = 0
32*T^-1-2*T^1+12*T^0 = 0
(12*T^1-2*T^2+32*T^0)/(T^1) = 0 // * T^2
T^1*(12*T^1-2*T^2+32*T^0) = 0
T^1
12*T-2*T^2+32 = 0
12*T-2*T^2+32 = 0
DELTA = 12^2-(-2*4*32)
DELTA = 400
DELTA > 0
T = (400^(1/2)-12)/(-2*2) or T = (-400^(1/2)-12)/(-2*2)
T = -2 or T = 8
T in { -2, 8}
T in { -2, 8 }
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