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Mathematics
Problem
Given a positive constant
a
a
a
, explain why every point of the form
(
k
,
2
a
k
)
(k,2\sqrt{ak})
(
k
,
2
ak
)
with
k
>
0
k>0
k
>
0
lies on the parabola
y
2
=
4
a
x
y^{2}=4ax
y
2
=
4
a
x
.
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