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D( a )
24*a^2-4 = 0
24*a^2-4 = 0
24*a^2-4 = 0
24*a^2 = 4 // : 24
a^2 = 1/6
a^2 = 1/6 // ^ 1/2
abs(a) = (1/6)^(1/2)
a = (1/6)^(1/2) or a = -(1/6)^(1/2)
a in (-oo:-(1/6)^(1/2)) U (-(1/6)^(1/2):(1/6)^(1/2)) U ((1/6)^(1/2):+oo)
(-35*a^3)/(24*a^2-4) = 0
-35*a^3 = 0 // : -35
a^3 = 0
a = 0
a = 0
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