Odpowiedzi

2010-02-27T20:20:05+01:00
2x>4x
2x-4x>0
-2x>0 : (-2)
x>0
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2010-02-27T20:20:25+01:00
X2>4x
x2-4x>0
x(x-4)>0
x=0 v x-4=0
x=0 v x=4

rysujemy parabole ramionami do gory
x∈(-∞,0) u (4,∞)
1 5 1