oblicz nierownosc podaj odpowiednie zalozenie:
3-4x/x+2>0
D: x∈R\{-2}
3 -4x >0
-4x > -3 /:(-4)
x< 3/4
x∈( -∞ , 3/4)\{-2}
3-4x
------ >0 /*(x+2)
x+2
3-4x>0
-4x>-3/:(-4)
x<3/4
Założenie
x+2≠0
x≠-2
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D: x∈R\{-2}
3 -4x >0
-4x > -3 /:(-4)
x< 3/4
x∈( -∞ , 3/4)\{-2}
3-4x
------ >0 /*(x+2)
x+2
3-4x>0
-4x>-3/:(-4)
x<3/4
Założenie
x+2≠0
x≠-2