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D( k )
k = 0
k = 0
k = 0
k in (-oo:0) U (0:+oo)
(3*k+2)/k+(k-4)/k = 0
3*k+k-4+2 = 0
4*k-2 = 0
(4*k-2)/k = 0
(4*k-2)/k = 0 // * k
4*k-2 = 0
4*k-2 = 0 // + 2
4*k = 2 // : 4
k = 2/4
k = 1/2
k = 1/2
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