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Mathematics
Mathematics
Problem
On the curve
x
2
−
x
y
+
y
2
=
3
x^{2}-xy+y^{2}=3
x
2
−
x
y
+
y
2
=
3
, which of the following points corresponds to a horizontal tangent line? a)
(
0
,
3
)
(0,\sqrt{3})
(
0
,
3
)
b)
(
2
,
1
)
(2,1)
(
2
,
1
)
c)
(
1
,
2
)
(1,2)
(
1
,
2
)
d)
(
3
,
0
)
(\sqrt{3},0)
(
3
,
0
)
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