• 2022-05-27
    判断下列集合和给定运算是否构成环、整环和域,如果不能构成,说明理由. [br][/br][tex=6.5x1.357]2VDCDFa7z0SMjelO8yuYjtfdAimkQnvi1FJP9nk+86A=[/tex]运算为实数加法和乘法.