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Mathematics
Problem
Which of the following best expresses the commutative property of vector addition? a)
a
−
b
=
b
−
a
\mathbf{a}-\mathbf{b}=\mathbf{b}-\mathbf{a}
a
−
b
=
b
−
a
b)
k
(
a
+
b
)
=
k
a
+
k
b
k\left(\mathbf{a}+\mathbf{b}\right)=k\mathbf{a}+k\mathbf{b}
k
(
a
+
b
)
=
k
a
+
k
b
c)
a
+
b
=
b
+
a
\mathbf{a}+\mathbf{b}=\mathbf{b}+\mathbf{a}
a
+
b
=
b
+
a
d)
(
a
+
b
)
+
c
=
a
+
(
b
+
c
)
\left(\mathbf{a}+\mathbf{b}\right)+\mathbf{c}=\mathbf{a}+\left(\mathbf{b}+\mathbf{c}\right)
(
a
+
b
)
+
c
=
a
+
(
b
+
c
)
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