From Wikipedia, the free encyclopedia
正數係指大過0嘅實數,同負數相對。不過0本身並唔係正數或者負數。同實數一樣,正數都係一個不可數嘅無限集合。呢個集合喺數學上通常用粗體R+或者ℝ+嚟表示。正數同0統稱非負數。
數學嘅數 |
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延伸 |
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圓周率 π = 3.141592653… |
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