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Q.

The product of the four values of 12+i323/4 is

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a

i

b

1

c

-i

d

-1

answer is B.

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Detailed Solution

12+i323/4=cosπ3+i sinπ33/4 =cos π+i sin π1/4

 Product of   n  th   roots of z=(-1)n-1z

Product of 4th roots of (cos π+i sin π)1/4=(-1)4-1(cos π+i sin π)

                                                                                =(-1)3 (-1)=1

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