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Question
junior college 1 | H1 Maths
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Date Posted: 3 months ago
Views: 59
Solving steps:
Let F be the foot of perpendicular from (2, 2, 4) to the plane.
Let A' be the reflection of A in the plane.
1. vector OF = (2, 2, 4) + t(4, 7, 8) where t is real
2. vector OF . (4, 7, 8) = 19, then solve for t
3. Obtain vector OF
4. By midpoint theorem,
vector OF = 1/2 (vector 0A + vector OA'), then find vector OA'
Answers:
a = -22/129
b = -232/129
c = -44/129
Let F be the foot of perpendicular from (2, 2, 4) to the plane.
Let A' be the reflection of A in the plane.
1. vector OF = (2, 2, 4) + t(4, 7, 8) where t is real
2. vector OF . (4, 7, 8) = 19, then solve for t
3. Obtain vector OF
4. By midpoint theorem,
vector OF = 1/2 (vector 0A + vector OA'), then find vector OA'
Answers:
a = -22/129
b = -232/129
c = -44/129
See 1 Answer
done
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I think there’re a lot of answers for this question, but these can be the simplest examples by just reflecting about each plane for 1,3,4; you may try to think how 2 can be obtained.
Date Posted:
3 months ago
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