Funkcja liniowa spełnia warunki f(2)=2 i f(x+2)=f(x)+4 zatem:
a) f(x)=x
b) f(x)=-2x+6
c) f(x)=2x-2
d)f(x)=3x-4
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Odp. c
f(x) = 2x - 2
bo
f(2) = 2*2 - 2 = 4 - 2 = 2
f(x + 2) = 2*(x +2) - 2 = 2x + 4 - 2 = 2x + 2 = 2x - 2 + 4 = f(x) + 4
odpowiedz C