好吧问答库 > 数学里的N、R是什么意思

数学里的N、R是什么意思

2025年03月27日 00:08
有5个网友回答
网友（1）：

N表示正整数（包括0）集合
N*表示正整数（不包括0）集合
R表示实数集合
R+表示正实数集合
R-表示负实数集合
R*表示非零实数集合
Z表示全体整数集合
Q表示有理数集合

网友（2）：

N就是NATUE的意思 自然数
R就是REAL的意思 实数。

网友（3）：

N 自然数 1，2，3，4
R 实数 2/3， 1， e

网友（4）：

N 自然数
R 实数

网友（5）：

N 自然数 1，2，3，4
R 实数 2/3， 1， e

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