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All the points in the set S={(alpha+i)/(...

All the points in the set `S={(alpha+i)/(alpha-i):alpha in R } (i= sqrt(-1))lie` on a

A

straight line whose slope is 1

B

circle whose radius is 1

C

circle whose radius is `sqrt(2)`

D

straight line whose slope is -1

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The correct Answer is:
B
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