If `x = \frac{\sqrt{3}+1}{\sqrt{3}-1}` and `y = \frac{\sqrt{3}-1}{\sqrt{3}+1}`, then show that -
(i) `\frac{x^2+y^2}{x^2-y^2} = \frac{7\sqrt{3}}{12}`.
(ii) `x^2/y + y^2/x = 52`