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\sqrt[4]{- 81}

এর মান কত?

\pm \frac{3}{\sqrt{2}} (1 \pm i)

\pm \frac{3}{\sqrt{2}} (1 \pm 2 i)

\pm \frac{3}{\sqrt{2}} (2 \pm i)

\pm \frac{\sqrt{3}}{2} (1 \pm i)

ANS : 4

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