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Mathematics
Mathematics
Problem
The equation of the circle which passes through
(
1
,
0
)
(1, 0)
(
1
,
0
)
and
(
0
,
1
)
(0, 1)
(
0
,
1
)
and has its radius as small as possible is a.
x
2
+
y
2
+
x
+
y
=
0
x^2 + y^2 + x + y = 0
x
2
+
y
2
+
x
+
y
=
0
b.
x
2
+
y
2
−
x
+
y
=
0
x^2 + y^2 - x + y = 0
x
2
+
y
2
−
x
+
y
=
0
c.
x
2
+
y
2
+
x
−
y
=
0
x^2 + y^2 + x - y = 0
x
2
+
y
2
+
x
−
y
=
0
d.
x
2
+
y
2
−
x
−
y
=
0
x^2 + y^2 - x - y = 0
x
2
+
y
2
−
x
−
y
=
0
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