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Mathematics
Mathematics
Problem
The focus of a parabola is
(
5
,
0
)
(5,0)
(
5
,
0
)
and its directrix is the line
x
=
−
5
x=-5
x
=
−
5
. If the point
(
k
+
2
,
4
5
)
(k+2, 4\sqrt{5})
(
k
+
2
,
4
5
)
lies on this parabola, the value of
k
k
k
is a)
3
3
3
b)
0
0
0
c)
2
2
2
d)
4
4
4
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