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Mathematics
Mathematics
Problem
If
x
y
=
1
xy = 1
x
y
=
1
; then minimum value of
x
2
+
y
2
x^2 + y^2
x
2
+
y
2
is : (a) 1 (b) 2 (c)
2
\sqrt{2}
2
(d) 4
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