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D( y )
24-(6*y^2) = 0
24-(6*y^2) = 0
24-(6*y^2) = 0
24-6*y^2 = 0
-6*y^2 = -24 // : -6
y^2 = 4
y^2 = 4 // ^ 1/2
abs(y) = 2
y = 2 or y = -2
y in (-oo:-2) U (-2:2) U (2:+oo)
(y^2-y-2)/(24-(6*y^2)) = 0
(y^2-y-2)/(24-6*y^2) = 0
y^2-y-2 = 0
y^2-y-2 = 0
DELTA = (-1)^2-(-2*1*4)
DELTA = 9
DELTA > 0
y = (9^(1/2)+1)/(1*2) or y = (1-9^(1/2))/(1*2)
y = 2 or y = -1
(y+1)*(y-2) = 0
((y+1)*(y-2))/(24-6*y^2) = 0
( y+1 )
y+1 = 0 // - 1
y = -1
( y-2 )
y-2 = 0 // + 2
y = 2
y in { 2}
y = -1
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