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Mathematics
Problem
For the ellipse
x
2
9
+
y
2
16
=
1
\dfrac{x^{2}}{9}+\dfrac{y^{2}}{16}=1
9
x
2
+
16
y
2
=
1
, the end-points of a latus rectum are: a)
(
7
,
±
9
4
)
(\sqrt7,\,\pm\dfrac{9}{4})
(
7
,
±
4
9
)
b)
(
±
9
4
,
7
4
)
(\pm\dfrac{9}{4},\,\dfrac{\sqrt7}{4})
(
±
4
9
,
4
7
)
c)
(
±
9
4
,
7
)
(\pm\dfrac{9}{4},\,\sqrt7)
(
±
4
9
,
7
)
d)
(
±
9
2
,
7
)
(\pm\dfrac{9}{2},\,\sqrt7)
(
±
2
9
,
7
)
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