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D( k )
k = 0
k = 0
k = 0
k in (-oo:0) U (0:+oo)
2*k-(3/k) = 4/3 // - 4/3
2*k-(3/k)-(4/3) = 0
2*k-3*k^-1-4/3 = 0
2*k^1-3*k^-1-4/3*k^0 = 0
(2*k^2-4/3*k^1-3*k^0)/(k^1) = 0 // * k^2
k^1*(2*k^2-4/3*k^1-3*k^0) = 0
k^1
2*k^2+(-4/3)*k-3 = 0
2*k^2+(-4/3)*k-3 = 0
DELTA = (-4/3)^2-(-3*2*4)
DELTA = 232/9
DELTA > 0
k = ((232/9)^(1/2)-(-4/3))/(2*2) or k = (-(-4/3)-(232/9)^(1/2))/(2*2)
k = ((232/9)^(1/2)+4/3)/4 or k = (4/3-(232/9)^(1/2))/4
k in { (4/3-(232/9)^(1/2))/4, ((232/9)^(1/2)+4/3)/4}
k in { (4/3-(232/9)^(1/2))/4, ((232/9)^(1/2)+4/3)/4 }
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