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If z(1) and z(2)(ne0) are two complex nu...

If `z_(1) and z_(2)(ne0)` are two complex numbers, prove that:
(i) `|z_(1)z_(2)|=|z_(1)||z_(2)|`
(ii) `|(z_(1))/(z_(2))|=(|z_(1)|)/(|z_(2)|),z_(2)ne0`.

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