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Mathematics
Mathematics
Problem
The coordinates of the foci of 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
are a)
(
0
,
±
4
)
(0,\pm4)
(
0
,
±
4
)
b)
(
±
7
,
0
)
(\pm\sqrt{7},0)
(
±
7
,
0
)
c)
(
0
,
±
7
)
(0,\pm\sqrt{7})
(
0
,
±
7
)
d)
(
0
,
±
3
)
(0,\pm3)
(
0
,
±
3
)
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