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D( q )
q = 0
q = 0
q = 0
q in (-oo:0) U (0:+oo)
11*q-3 = 1/q // - 1/q
11*q-(1/q)-3 = 0
11*q-q^-1-3 = 0
11*q^1-1*q^-1-3*q^0 = 0
(11*q^2-3*q^1-1*q^0)/(q^1) = 0 // * q^2
q^1*(11*q^2-3*q^1-1*q^0) = 0
q^1
11*q^2-3*q-1 = 0
11*q^2-3*q-1 = 0
DELTA = (-3)^2-(-1*4*11)
DELTA = 53
DELTA > 0
q = (53^(1/2)+3)/(2*11) or q = (3-53^(1/2))/(2*11)
q = (53^(1/2)+3)/22 or q = (3-53^(1/2))/22
q in { (3-53^(1/2))/22, (53^(1/2)+3)/22}
q in { (3-53^(1/2))/22, (53^(1/2)+3)/22 }
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