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a1*a2=-1 dla prostych prostopadłych
a)
b=2
3a=-1
a=-1/3
y=-1/3x+2
b)
-1/2a=-1
a=2
y=2x+b
2*3+b=1
b=1-6 = -5
y=2x-5
2.
a1=a2 proste rownoległe: k i m, r i t.
a1*a2=-1 proste prostopadłe: l i p.