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Question

$\sqrt[3]{a + i b} = x + i y$ হলে $\frac{b}{y} - \frac{a}{x}$ = কত?

$2 (x^{2} - y^{2})$

$2 (x^{2} + y^{2})$

$- 2 (x^{2} + y^{2})$

$2 (y^{2} - x^{2})$

ANS :

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