जर x4 + y4 + x2y2 = 27 आणि x2 + y2 - xy = 9, तर \(\frac{x}{y}+\frac{y}{x}\) चे मूल्य काय आहे?

1
3
2
\(-\frac{3}{2}\)
3
- 2
4
\(\frac{5}{4}\)

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