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Let a = i + 2 j - 3 k and b = 4 i + 2 k. What is a· b? | StemPy Lab
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Let a = i + 2 j - 3 k and b = 4 i + 2 k. What is a· b?
Mathematics
Easy
High School (11–12)
Vectors and Three-Dimensional Geometry › Vector Algebra
A-Level
IB
Created by
StemPy Lab
Let
a
⃗
=
i
^
+
2
j
^
−
3
k
^
\vec a = \hat i + 2\hat j - 3\hat k
a
=
i
^
+
2
j
^
−
3
k
^
and
b
⃗
=
4
i
^
+
2
k
^
\vec b = 4\hat i + 2\hat k
b
=
4
i
^
+
2
k
^
. What is
a
⃗
⋅
b
⃗
\vec a\cdot\vec b
a
⋅
b
?
−
2
-2
−
2
0
0
0
2
2
2
10
10
10
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