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Mathematics
Mathematics
Problem
Which one of the following vectors is perpendicular to
a
=
(
5
,
−
2
)
\mathbf{a}=(5,-2)
a
=
(
5
,
−
2
)
? a)
(
−
2
,
5
)
(-2,5)
(
−
2
,
5
)
b)
(
2
,
5
)
(2,5)
(
2
,
5
)
c)
(
5
,
2
)
(5,2)
(
5
,
2
)
d)
(
2
,
−
5
)
(2,-5)
(
2
,
−
5
)
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