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Mathematics
Problem
Consider the parabola
x
2
=
4
a
y
(
a
>
0
)
x^{2}=4ay\,(a>0)
x
2
=
4
a
y
(
a
>
0
)
. If
P
(
3
a
,
7
a
)
P(3a,7a)
P
(
3
a
,
7
a
)
is reflected about the axis of the parabola, what are the coordinates of its image? a)
(
3
a
,
−
7
a
)
(3a,-7a)
(
3
a
,
−
7
a
)
b)
(
7
a
,
3
a
)
(7a,3a)
(
7
a
,
3
a
)
c)
(
−
3
a
,
7
a
)
(-3a,7a)
(
−
3
a
,
7
a
)
d)
(
−
3
a
,
−
7
a
)
(-3a,-7a)
(
−
3
a
,
−
7
a
)
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