prosta l: x+By-2 =0 jest prostopadla do prostej k:6x-2x+1=0 zatem:
A. 1/3
B.2
C.3
D.6
x + By - 2 = 0 6x - 2y + 1 = 0
By = -x + 2 -2y = -6x - 1
y = -1/Bx + 2/B y = 3x + 1/2
Proste są prostopadłe gdy
-1/B * 3 = -1 ---- / * (-1)
3/B = 1 ---- / * B
B = 3
odp. C
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x + By - 2 = 0 6x - 2y + 1 = 0
By = -x + 2 -2y = -6x - 1
y = -1/Bx + 2/B y = 3x + 1/2
Proste są prostopadłe gdy
-1/B * 3 = -1 ---- / * (-1)
3/B = 1 ---- / * B
B = 3
odp. C