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k in (-oo:+oo)
2*k-(3/3) < 3 // - 3
2*k-(3/3)-3 < 0
2*k-3-1 < 0
2*k-4 < 0 // + 4
2*k < 4 // : 2
k < 4/2
k < 2
k in (-oo:2)
(-oo:2)
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