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A = (1 , 4)
B = (1 , - 2)
x₁ = 1
x₂ = 1
y₁ = 4
y₂ = - 2
równanie prostej przechodzącej przez 2 dane punkty
(x₂ - x₁)(y - y₁) = (y₂ - y₁)(x - x₁)
(1 - 1)(y - 4) = (- 2 - 4)(x - 1)
0 = - 6(x - 1)
6x = 6
x = 1
prosta prostopadła do osi x przechodząca przez punkt 1
zad 2
M = (1,1)
N = (5 ,- 9)
x₁ = 1
x₂ = 5
y₁ = 1
y₂ = - 9
S - punkt środkowy = (xs , ys) = {(x₁ + x₂/2) , (y₁ + y₂)/2} =
= {(1 + 5)/2 , (1 - 9)/2} = {6/2) , - 8/2} = (3 , - 4)
środek odcinka to: