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Question

If a=22i then which of the following is correct?


A

a=1+i

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B

a=2×(1+i)

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C

1

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D

None of these

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Solution

The correct option is A

a=1+i


We have a =2i=2(cosπ2+isinπ2)12=2(eiπ2)12=2eiπ4=2(12+i2i)=1+i
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