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Byju's Answer
Standard XII
Mathematics
Double Ordinate
Find the equa...
Question
Find the equation of the parabola whose vertex is
(
3
,
−
2
)
and focus is
(
3
,
1
)
.
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Solution
Clearly we can see that axis of parabola is parallel to y-axis
Assume the equation of parabola to be :
(
x
−
h
)
2
=
4
b
(
y
−
k
)
Focus =
(
h
,
k
+
b
)
=
(
3
,
1
)
Vertex
=
(
h
,
k
)
=
(
3
,
−
2
)
⇒
h
=
3
,
k
=
−
2
,
b
=
3
⇒
equation of parabola is :
(
x
−
3
)
2
=
12
(
y
+
2
)
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