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f(x)= - 2x +1
a= -2
f(x) || f(x)1 (1 w indeksie dolnym)
a=a1 (1 indeks dolny)
3= -2×1 + b
3= -2 + b /+2
b=5
f(x)1 = -2x + 5
z.2
f(x) =(2-m)x-7
a<0
a= 2-m
2-m< 0
m> 2
m∈ (- ∞, 2)
z.3
y= ax+b
3= a×1 + b
3= 3a + b
a= 3 -b
3= 3(3-b) + b
a= 3-b
3=9 - 3b + b
a= 3-b
3= 9-2b
a= 3-b
2b= 6
a=3-b
b= 3
a=3-3
b=3
a= 0
b= 3
(pary zapisujemy w klamrach jak układ równan)
y=3