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f(x)=k/(x+1)+2
f(0)=k+2=-3
k=-5
f(x)=(-5+2x+2)/(x+1) = (2x-3)/(x+1), x≠-1
a)
a=2, b=-3, c=1
b)
(2x-3)/(x+1) < 0
m.z. 2x-3=0
x=1,5
Odczytuje z wykresu:
f(x)<0 dla x∈(-1, 1,5)