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If sqrt(a + ib) = x + iy, then possible ...

If `sqrt(a + ib)` = x + iy, then possible value of `sqrt(a - ib) ` is

A

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

B

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

C

`x+iy`

D

`x-iy`

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The correct Answer is:
D
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