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a=0
a). f(x)=(5-m)x-1
5-m=0
-m=-5
m=5
Odp. Dla m=5 f(x)=-1
b). f(x)=(½+5m)x-3
½+5m=0
5m=-½ /:5
m=-½*⅕
m=-¹/₁₀
Odp. Dla m=-¹/₁₀ f(x)=-3
c).f(x)=(m²-1)x
m²-1=0
(m-1)(m+1)=0
m=1 lub m=-1
Dla m=1 lub m=-1 f(x)=0