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Mathematics
Problem
The curve
x
2
+
y
2
−
4
x
+
2
y
=
0
x^{2}+y^{2}-4x+2y=0
x
2
+
y
2
−
4
x
+
2
y
=
0
is restricted to the domain
x
≥
0
x\ge 0
x
≥
0
. Determine the minimum
y
y
y
-coordinate attained by points on this curve within the stated domain.
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