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Mathematics
Mathematics
Problem
The position vector of the image of the point
a
a
a
in the plane
r
⋅
n
^
=
d
r \cdot \hat{n} = d
r
⋅
n
^
=
d
must be (
d
≠
0
d \neq 0
d
=
0
) a.
−
a
⋅
n
^
-a \cdot \hat{n}
−
a
⋅
n
^
b.
a
−
2
(
d
−
a
⋅
n
^
)
n
^
a - 2(d - a \cdot \hat{n}) \hat{n}
a
−
2
(
d
−
a
⋅
n
^
)
n
^
c.
a
+
2
(
d
−
a
⋅
n
^
)
n
^
a + 2(d - a \cdot \hat{n}) \hat{n}
a
+
2
(
d
−
a
⋅
n
^
)
n
^
d.
a
+
d
(
−
a
⋅
n
^
)
a + d(-a \cdot \hat{n})
a
+
d
(
−
a
⋅
n
^
)
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