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নিম্নের নির্ণায়কের

(- 2 a)

[\begin{matrix} 1 + a^{2 -} b^{2} & 2 a b & - 2 b \\ 2 a b & 1 - a^{2 +} b^{2} & 2 a \\ 2 b & - 2 a & 1 - a^{2 -} b^{2} \end{matrix}]

(1 - a^{4}) - b^{2} (4 - b^{2})

2 a (1 + a^{2} + b^{2})

- 2 a (1 + a^{2} + b^{2})

(1 + a^{2} + b^{2})

- 2 a (1 + a^{2} + b^{2})^{3}

ANS : 5

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