if a = (3, 2, 9) and b = (-4, 7, 2), find a • b. a)a • b =-9 b) a • b = 19 c) a • b = 20 d) a • b = 12

In this question we have to find the value of a·b

Answered: if a = (3, 2, 9) and b = (-4, 7, 2),…

Elementary Geometry For College Students, 7e

7th Edition

ISBN:9781337614085

Author:Alexander, Daniel C.; Koeberlein, Geralyn M.

Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.

Chapter1: Line And Angle Relationships

Section1.3: Introduction To Geometric Proof

Problem 37E

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if a = (3, 2, 9) and b = (-4, 7, 2), find a • b. a) a • b =-9 b) a • b = 19 c) a • b = 20 d) a • b = 12