Vectors Help!

1. Given a = [2, 3, 7] and b = [−3, 4, −1], find
a. |2a |
b. 3a − 4b
= [18,-7,25]?
c. The angle between b and a
d. A unit vector in the direction of b
e. a • b
f. A vector perpendicular to a .
g. The vector projection of b on a .

Question

Vectors Help!

1.	Given a  = [2, 3, 7] and b  = [−3, 4, −1], find 
a.	|2a |
b.	3a  − 4b 
= [18,-7,25]?
c.	The angle between b  and a 
d.	A unit vector in the direction of b 
e.	a  • b 
f.	A vector perpendicular to a .
g.	The vector projection of b  on a .

amistre64 · Answer

what parts are giving you room to pause?

anonymous · Answer

Most of them, the joys of having a really vague course.

amistre64 · Answer

the length of a vector is just the sqrt of the sum of the square of its parts :)

anonymous · Answer

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