The points A and B have position vectors, relative to the origin O, given by OA = i+ 2j + 3k and OB = 2i +j+ 3k. The line I has vector equation = (1 – 21)i + (5 + )j+ (2 – t)k. (i) Show that I does not intersect the line passing through A and B.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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can you do part a only?
10 The points A and B have position vectors, relative to the origin O, given by
OA = i+ 2j + 3k and OB = 2i +j+ 3k.
The line I has vector equation
3(1-20)i + (5 + oj+ (2 – t)k.
(i) Show that I does not intersect the line passing through A and B.
(ii) The point P lies on I and is such that angle PAB is equal to 60°.
Given that the position vector of P is (1- 20)i + (5+ t)j + (2 – t)k,
show that 3t2 +7t+2 0. Hence find the only possible position
vector of P.
n atiou al 4S & 4 I cucl MMathematics
Transcribed Image Text:10 The points A and B have position vectors, relative to the origin O, given by OA = i+ 2j + 3k and OB = 2i +j+ 3k. The line I has vector equation 3(1-20)i + (5 + oj+ (2 – t)k. (i) Show that I does not intersect the line passing through A and B. (ii) The point P lies on I and is such that angle PAB is equal to 60°. Given that the position vector of P is (1- 20)i + (5+ t)j + (2 – t)k, show that 3t2 +7t+2 0. Hence find the only possible position vector of P. n atiou al 4S & 4 I cucl MMathematics
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