Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Let
a
\mathbf{a}
a
,
b
\mathbf{b}
b
and
c
\mathbf{c}
c
be vectors with magnitudes 3, 4 and 5, respectively and
a
+
b
+
c
=
0
\mathbf{a} + \mathbf{b} + \mathbf{c} = 0
a
+
b
+
c
=
0
, then the values of
a
⋅
b
+
b
⋅
c
+
c
⋅
a
\mathbf{a} \cdot \mathbf{b} + \mathbf{b} \cdot \mathbf{c} + \mathbf{c} \cdot \mathbf{a}
a
⋅
b
+
b
⋅
c
+
c
⋅
a
is a. 47 b. 25 c. 50 d. -25
Browse the problem library