# Vectors Help !!!

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#1
Question: Point A has coordinates (2, 3, 6). Point B has coordinates (8, 6, 8). Find the point C so that AB and AC are in the same direction and |AC| = 77.

My working thus far: AB = (4 3 2) => AC = k(4 3 2) = 77

=> k * r29 = 77 => k = 77r29/29 => AC = 77r29/29 (4 3 2)

This looks too ugly to be right. Where have I gone wrong?
0
1 month ago
#2
(Original post by sanctepiex)
Question: Point A has coordinates (2, 3, 6). Point B has coordinates (8, 6, 8). Find the point C so that AB and AC are in the same direction and |AC| = 77.

My working thus far: AB = (4 3 2) => AC = k(4 3 2) = 77

=> k * r29 = 77 => k = 77r29/29 => AC = 77r29/29 (4 3 2)

This looks too ugly to be right. Where have I gone wrong?
AB isn't correct
0
#3
(Original post by mqb2766)
AB isn't correct
Ah I got it now cheers
1
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