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Komplexkonjugat av ett komplext tal med positiv imaginärdel

När man bestämmer komplexkonjugatet för ett komplext tal byter man tecken på dess imaginärdel. Om imaginärdelen är positiv, blir den negativ för komplexkonjugatet. För exempelvis det komplexa talet z=-4+7i blir dess komplexkonjugat
z=-47i.

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