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y=a(x-p)^2+q
a=-1/2<0 , więc Zwf to przedział (-∞, q>
odczytujemy, ze q=-1
Zwf: y€ (-∞ ,-1>
postac ogólna:
y=-1/2(x+2)^2-1=-1/2(x^2+4x+4)-1=
=-1/2x^2 - 2x - 3