\(If\;x\; = \;\frac{{\sqrt 7 \; + \;1}}{{\sqrt 7 - 1}},\;y\; = \;\frac{{\sqrt 7 - 1}}{{\sqrt 7 \; + \;1}},\;find\;the\;value\;of\;\frac{{{x^{2\;}}\; + \;xy\; + \;{y^2}}}{{{x^{2\;}} - \;xy\; + \;{y^2}}}\)

1
31/54
2
54/31
3
37/55
4
55/37

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