The equations of two straight lines are r =i+ 4j – 2k + 2(i+ 3k) and r = ai + 2j – 2k + µ(i + 2j + 3ak), where a is a constant.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter3: Functions And Graphs
Section3.3: Lines
Problem 21E
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The equations of two straight lines are
r = i+ 4j – 2k + a(i + 3k) and
r = ai + 2j – 2k + µ(i + 2j + 3ak),
where a is a constant.
(i) Show that the lines intersect for all values of a.
(ii) Given that the point of intersection is at a distance of 9 units from the origin, find the possible
values of a.
Transcribed Image Text:The equations of two straight lines are r = i+ 4j – 2k + a(i + 3k) and r = ai + 2j – 2k + µ(i + 2j + 3ak), where a is a constant. (i) Show that the lines intersect for all values of a. (ii) Given that the point of intersection is at a distance of 9 units from the origin, find the possible values of a.
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