Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Let
v
=
3
i
^
−
4
j
^
+
12
k
^
\mathbf{v}=3\hat{i}-4\hat{j}+12\hat{k}
v
=
3
i
^
−
4
j
^
+
12
k
^
. Find
∣
−
2
v
∣
|\,-2\mathbf{v}\,|
∣
−
2
v
∣
. a) 52 b) 26 c) 13 d)
−
26
-26
−
26
Browse the problem library