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If sqrt(a+i b)=x+i y, then a possible va...

If `sqrt(a+i b)=x+i y`, then a possible value of `sqrt(a-i b)` is

A

`x^(2)+y^(2)`

B

`sqrt(x^(2)+y^(2))`

C

` x+i y`

D

` x-i y`

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The correct Answer is:
D
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