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D( H )
H = 0
H = 0
H = 0
H in (-oo:0) U (0:+oo)
3*H-(16/H) = 0
3*H-16*H^-1 = 0
3*H^1-16*H^-1 = 0
(3*H^2-16*H^0)/(H^1) = 0 // * H^2
H^1*(3*H^2-16*H^0) = 0
H^1
3*H^2-16 = 0
3*H^2-16 = 0
DELTA = 0^2-(-16*3*4)
DELTA = 192
DELTA > 0
H = (192^(1/2)+0)/(2*3) or H = (0-192^(1/2))/(2*3)
H = (4*3^(1/2))/3 or H = (-4*3^(1/2))/3
H in { (-4*3^(1/2))/3, (4*3^(1/2))/3}
H in { (-4*3^(1/2))/3, (4*3^(1/2))/3 }
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