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-2a+b=4
8a+b=-1
b=4+2a
8a+4+2a=-1
10a=-5 /:10
a=-1/2
b=4+2a=4+2*(-1/2)=4-1=3
więc:
y=-1/2x+3
podstawiam punkt B:
m-2 = -1/2*2m +3
m-2=-m+3
2m=5 /:2
m=2 1/2
spr.
x=2m=2*2 1/2=5
y=m-2=2 1/2-2 =1/2
y=-1/2x+3
1/2=-1/2*5 +3
1/2=-2 1/2+3
1/2=1/2
odp.
Punkty A,B,C sa wspołliniowe dla m=2 1/2
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