The line I has equation r = 4i – 9j + 9k + 2(-2i + j- 2k). The point A has position vector 3i + 8j + 5k. (i) Show that the length of the perpendicular from A to l is 15. (ii) The line I lies in the plane with equation ax + by – 3z + 1 = 0, where a and b are constants. Find the values of a and b.

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter10: Analytic Geometry
Section10.6: The Three-dimensional Coordinate System
Problem 7E
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The line I has equation r = 4i – 9j + 9k + (-2i + j – 2k). The point A has position vector 3i + 8j + 5k.
(i) Show that the length of the perpendicular from A to l is 15.
(ii) The line I lies in the plane with equation ax + by – 3z +1 = 0, where a and b are constants. Find
the values of a and b.
Transcribed Image Text:The line I has equation r = 4i – 9j + 9k + (-2i + j – 2k). The point A has position vector 3i + 8j + 5k. (i) Show that the length of the perpendicular from A to l is 15. (ii) The line I lies in the plane with equation ax + by – 3z +1 = 0, where a and b are constants. Find the values of a and b.
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