Given x + y = 2, xy = 1, find the value of (y + 1 / x + 1) + (x + 1 / y + 1),

x+y=2,xy=1,
Solution
x=y=1
therefore
(y+1/x+1)+（x+1/y+1）
=（1+1）/(1+1)+（1+1）/(1+1)
=1+1
=2

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