defence exam CRPF Head Constable Ministerial & ASI 2022 Mock Test Quantitative Aptitude Algebra Identities
If x = 7 + 4√3 and xy = 1, then the value of \(\rm \left(\frac{1}{x^2}+\frac{1}{y^2}\right)\) is-
1
\(\frac{7+4\sqrt{3}}{7-4\sqrt3}\)
2
85√3
3
57
4
194