railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Algebra

\(\rm a+\frac{1}{a}=2\) এবং \(\rm b+\frac{1}{b}=-2\) হলে, \(\rm a^2+\frac{1}{a^2}+b^2+\frac{1}{b^2}\) এর মান কত?

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