2x/(x-1) > 0
0 1
a = 2 > 0 zatem ramiona paraboli rysujemy do góry
+++ +++++
--------o----------o--------->
0 ----- 1
odp. x ∈ (-oo, 0) u (1, +oo)
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2x/(x-1) > 0
0 1
a = 2 > 0 zatem ramiona paraboli rysujemy do góry
+++ +++++
--------o----------o--------->
0 ----- 1
odp. x ∈ (-oo, 0) u (1, +oo)