18) Find a + b, 2a + 3b, |a|,  and |a - b|.  a = 2i - 4j + 4k, b = 2j - k

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter9: Systems Of Equations And Inequalities
Section9.3: Systems Of Inequalities
Problem 15E
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18) Find a + b, 2a + 3b, |a|,  and |a - b|. 

a = 2i - 4j + 4k, b = 2j - k

15–18 Find a + b, 2a + 3b, | a|, and | a – b|.
– b|.
15. а 3 (5, —12), ь %3 (-3, —6)
16. а — 4i + j, Ь%3Dі - 2j
17. а %3Dі + 2j — 3к, b %3D -2i —ј + 5k
18. а — 2і — 4j + 4k, b — 2j — k
|
Transcribed Image Text:15–18 Find a + b, 2a + 3b, | a|, and | a – b|. – b|. 15. а 3 (5, —12), ь %3 (-3, —6) 16. а — 4i + j, Ь%3Dі - 2j 17. а %3Dі + 2j — 3к, b %3D -2i —ј + 5k 18. а — 2і — 4j + 4k, b — 2j — k |
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