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Question

\frac{i - i^{- 1}}{i + 2 i^{- 1}}

এর মান এবং নতি হবে যথাক্রমে -

0,0

- 2 i, \frac{- π}{2}

2 i, \frac{π}{2}

-2,

π

ANS : 4

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