If z(1), z(2) are two complex numbers su...

If `z_(1), z_(2)` are two complex numbers such that `Im(z_(1)+z_(2))=0 `and `Im(z_(1) z_(2))=0`, then

`z_(1)=-z_(2)`

`z_(1)=z_(2)`

`z_(1)=-z_(2)`

` z_(1)=z_(2)^bar`

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