What is ||<4,9,−8>||?

1 Answer
David G.
Feb 17, 2016

The two vertical lines just mean 'the length of' the vector:

l=√42+92+(−8)2=√161≈12.7 units

Explanation:

Probably not a lot more explanation is needed. The formula for finding the length of a vector is something you should know because it is used very frequently.

It's probably worth noting that although this is a vector in three dimensions, it is still a square root, not a cube root.

Related questions
See all questions in Vector Operations
Impact of this question
1587 views around the world
You can reuse this answer
Creative Commons License