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The value of modulus of (a + ib)/(a - ib...

The value of modulus of `(a + ib)/(a - ib)` is ________

A

`a^(2) + b^(2)`

B

1

C

`(a + b)/(a - b)`

D

`sqrt((a^(2)+b^(2))/(a^(2)-b^(2)))`

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