state gov Calcutta High Court Lower Division Assistant (LDA) Mock Test 2024 Quantitative Aptitude Algebra Identities
\({\left( {{\rm{y}} - \frac{1}{{\rm{y}}}} \right)^2}\) का मान निर्धारित कीजिए जब \({\rm{\;}}{{\rm{y}}^4}{\rm{}} + {\rm{}}\frac{1}{{{{\rm{y}}^4}}}{\rm{}} = {\rm{}}34\) है
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